4. Research Reports in 2008 Fiscal Year

GCOE Program Members in 2008 Fiscal Year

Tohoku University GCOE program "Weaving Science Web beyond Particle-Matter Hierarchy"

4. Research Reports in 2008 Fiscal Year

4.1. GCOE Program Members

The GCOE has been organized by the program member of 26 professors of Graduate School

of Departments of Physics, Astronomy, Mathematics and Philosophy in 2008 fiscal year. Their

names and research titles are as follows.

・・・・Kunio Inoue (Physics, Professor, Program Leader)

1. Precise measurement of neutrino oscillation parameters,

2. Observation of geologically produced neutrinos,

3. Observation of low energy solar neutrinos,

4. Search for neutrino-less double beta decay in the ultra-low background environment,

5. Development for directional measurement of anti-neutrinos

・・・・Youichi Murakami (Physics, Professor)

Study of Orbital Ordering in Strongly Correlated Electron Systems

・・・・Ken-ichi Hikasa (Physics, Professor)

Theoretical High Energy Physics

・・・・Osamu Hashimoto (Physics, Professor)

Study on Hyper-Nucleus

・・・・Yoshio Kuramoto (Physics, Professor)

Theory of multipole order and fluctuations in strongly correlated electrons

・・・・Yoshiro Hirayama (Physics, Professor)

1. Transport characteristics of semiconductor quantum systems,

2. Hyperfine interactions and novel NMR (NER),

3. NMR (NER) studies of semiconductor quantum physics,

4. Nanoprobing of quantum physics,

5. Transport characteristics of nano-materials



・・・・Hirokazu Tamura (Physics, Professor)

Study of hypernuclei via high precision gamma-ray spectroscopy

・・・・Masahiro Yamaguchi (Physics, Professor)

Study of theoretical particle physics and early universe

・・・・Riichiro Saito (Physics, Professor)

Optical properties of carbon nanotubes

・・・・Hitoshi Yamamoto (Physics, Professor)

1. Study of CP invariance and flavor physics at the KEKB collider using the Belle

detector,

2. Planning of the International Linear Collider (ILC)

・・・・Toshihiro Kawakatsu (Physics, Professor)

Study on Structure and Dynamics of Soft Matter

・・・・Hajime Shimizu (Physics, Professor)

Study of Quark Nuclear Physics with a Photon Beam

・・・・Yasuhiro Sakemi (Physics, Professor)

Study of the violation of time reversal invariance with the search for electron electric dipole

moment measurements

・・・・Taka-hisa Arima (Physics, Professor)

Study of Interplay between Magnetism and Ferroelectricity in Transition-metal Oxide

Compounds

・・・・Kazuyoshi Yamada (Physics, Professor)

Study of novel properties on strongly correlated electron systems by using neutron

scattering

・・・・Takashi Takahashi (Physics, Professor)

Ultrahigh-resolution photoemission study of graphene and novel superconductors



・・・・Katsumi Tanigaki (Physics, Professor)

1. Physical properties of nano silicon and nano germanium compounds,

2. Nano carbon materials,

3. Synthesis and physical properties of new Fe superconductors,

4. Interface control and electronic properties of organic semiconductors

・・・・Hideo Kozono (Mathematics, Professor)

Study of Nonlinear Partial Differential Equations

・・・・Motoko Kotani (Mathematics, Professor)

Discrete Geometric Analysis, Differential Geometry

・・・・Reiko Miyaoka (Mathematics, Professor)

Study of hypersurface theory and special geometry

・・・・Eiji Yanagida (Mathematics, Professor)

Study of nonlinear elliptic and parabolic equations

・・・・Takashi Shioya (Mathematics, Professor)

Geometric analysis of metric spaces

・・・・Toshifumi Futamase (Astronomy, Professor)

Study of weak gravitational lensing for the application to the observational cosmology

・・・・Takashi Ichikawa (Astronomy, Professor)

Study of galaxy evolution at high redshift universe and new instruments for infrared

astronomy in Antarctica

・・・・Toru Yamada (Astronomy, Professor)

Study of Galaxy formation and Evolution

・・・・Keiichi Noe (Philosophy, Professor)

Study of the philosophy of science, especially philosophical integration of scientific

knowledge into human culture from a narratological point of view

GCOE Program Members


Research report of GCOE program members in 2008 fiscal year

Name Kunio Inoue

Department Physics (Research Center for Neutrino Science)

Position Professor

Research Titles 1. Precise measurement of neutrino oscillation parameters,

2. Observation of geologically produced neutrinos,

3. Observation of low energy solar neutrinos,

4. Search for neutrino-less double beta decay in the ultra-low

background environment,

5. Development for directional measurement of anti-neutrinos

I. Summary of Research in 2008 fiscal year

1. We have observed two cycles of clear oscillatory behavior in reactor neutrino survival

probabilities from 2881 ton-yr data accumulation. Consequently, the precise measurement

of the neutrino oscillation parameters has been performed. The precision of the

mass-squared difference has reached 2.7% level.

2. The accumulated data with an improved analysis increased the statistical significance of

geo-neutrinos to 2.8 sigma level. The observed geo-neutrino flux is well consistent with the

standard bulk silicate earth model. And the precision is already relevant to discriminate

exotic geological models. It also provided a limit on the hypothetical natural fission reactor

in the interior of the earth to be less than 6.2 TW at 90% C.L..

3. Intensive purification work of KamLAND liquid scintillator has been carried out.

Radioactive noble gases and heavy elements have been successfully reduced by 4 orders of

magnitude. We also succeeded to develop new dead-time-free electronics and baseline

restorer with which serious cosmogenic backgrounds at the CNO cycle neutrino window

can be reduced by factor 20.

4. The world most sensitive experiment in searching for neutrino-less double beta decay has

been projected, utilizing the ultra-low background environment of KamLAND. The high

solubility (3% at 15 degree C) and the least chemical activity of Xenon gas to the liquid

scintillator are very appropriate for the search. We’ve developed Xenon loaded liquid



scintillator with the same light yield, the same density and sufficient transparency

comparing with the current KamLAND scintillator. By suspending the developed liquid

scintillator loaded with 200kg of enriched Xenon-136 at the center of KamLAND, the

sensitivity to the Majorana neutrino mass reaches 60 meV in 5 years and with 1 ton of

enriched Xenon it reaches 30 meV in 5 years. It decisively verifies the KKDC claim and

the degenerated neutrino mass structure, and covers the inverted neutrino mass hierarchy.

5. We’ve successfully imaged muon tracks and gamma ray vertices created in liquid

scintillator using an image intensifier. It is relevant to determine characteristic recoil

direction of neutrons produced in the capture reaction of anti-neutrinos on protons. In order

to keep the direction information, diffusion of the produced neutron and capture signal of

the neutron in the media should be highly suppressed. Loading 6Li is very effective for the

purpose, because the capture cross section is high and the capture signal is alpha ray.

We’ve also succeeded in loading sufficient amount of Lithium in a scintillator cocktail and

detecting neutron captures in the scintillator.

II. Publications {Title, name(s), Journal, Vol., Page, (Year)}

1. “Precision Measurement of Neutrino Oscillation Parameters with KamLAND”,

The KamLAND Collaboration (S. Abe et al.),

Phys.Rev.Lett.100:221803,2008

2. “Solar neutrino measurements in Super-Kamiokande-II”,

Super-Kamiokande Collaboration (J.P.Cravens et al.),

Phys.Rev.D78:032002,2008

3. “Experimental results on neutrino masses and mixings”,

M.Koshiba, T.Kajita, T.Kobayashi, T.Nakaya, K.Nishikawa, A.Szuzuki, K.Inoue,

M.Nakahata,

Landolt-Boernstein I 21A: Elementary particles 11

III. Presentations {Title, Name(s), Conference Name, Term, City, Country}



Name Youichi Murakami

Department Physics

Position Professor

Research Title Study of Orbital Ordering in Strongly Correlated Electron

Systems


1. Orbital ordered states of YVO3 have been systematically investigated using the

low-temperature and high-pressure x-ray diffraction technique. The pressure-temperature

phase diagram for the orbital state is determined. The phase diagram shows that the C-type

orbital ordering is significantly stabilized relative to the G-type orbital ordering by

application of hydrostatic pressure. The pressure effect on the orbital ordering is discussed

from the viewpoint of the covalency among the R-ion d, the oxygen 2p and the vanadium

3d orbitals.

2. Crystal structure of artificial superlattices, [(LaMnO3)m(SrMnO3)m]n , and the valence

distribution of Mn ions have been studied using x-ray scattering technique. The stacking

structures were determined by the scattering intensities in the out-of–plane direction. The

Mn valence distributions were evaluated by the energy dependence of the scattering

intensity near the Mn K-edge, which was analyzed on the basis of the obtained crystal

structures. The result indicates that the Mn valence becomes 3+ (4+) in the LaMnO3

(SrMnO3) layers, and the valence has the intermediate value between 3+ and 4+ only at the

interface between LaMnO3 and SrMnO3 layers. We have also made clear that all the films

are insulator without reference the periodicity m.


1. Magnetic Compton profile study of orbital ordering state of 3d electrons in YTiO3,

Naruki Tsuji, Masahisa Ito, Hiroshi Sakurai, Kosuke Suzuki, Kei Tanaka, Kensuke Kitani,

Hiromichi Adachi, Hiroshi Kawata, Akihisa Koizumi, Hironori Nakao, Youichi Murakami,

Yasujiro Taguchi, and Yoshinori Tokura,

J. Phys. Soc. Jpn. 77, 023705/1-4 (2008).

2. Orbital ordering structures in (Nd,Pr)0.5Sr0.5MnO3 manganite thin films on perovskite

(011) substrates,

Yusuke Wakabayashi, Daisuke Bizen, Yugo Kubo, Hironori Nakao, Youichi Murakami,



Masao Nakamura, Yasushi Ogimoto, Kenjiro Miyano, and Hiroshi Sawa,

J. Phys. Soc. Jpn. 77, 014712/1-7 (2008).

3. Competition of magnetic and quadrupolar order parameters in HoB4,

Daisuke Okuyama, Takeshi Matsumura, Takuya Mouri, Naoko Ishikawa, Kenji Ohoyama,

Haruhiro Hiraka, Hironori Nakao, Kazuaki Iwasa, Youichi Murakami,

J. Phys. Soc. Jpn. 77, 044709/1-14 (2008).

4. Crystal structure and charge-ordering in La1.5Ca0.5CoO4 studied by neutron and

resonant x-ray scattering,

Kazumasa Horigane, Hironori Nakao, Yusuke Kousaka, Tetsuya Murata, Yukio Noda,

Youichi Murakami, and Jun Akimitsu,

J. Phys.Soc. Jpn. 77, 044601/1-6 (2008).

5. High-magnetic-field x-ray absorption spectroscopy of field-induced valence transition in

EuNi2(Si1-xGex)2,

Yasuhiro H. Matsuda, Toshiya Inami, Kenji Ohwada, Yuto Murata, Hiroyuki Nojiri,

Youichi Murakami, Akihiro Mitsuda, Hirofumi Wada, Hiroshi Miyazaki, Isao Harada,

J. Phys. Soc. Jpn. 77, 054713/1-7 (2008).

6. Magnetic excitations in the heavy electron state of the filled skutterudite PrxLa1-xFe4P12

(x=1.00 and 0.85),

Kazuaki Iwasa, Lijie Hao, Tomoo Hasegawa, Kenji Horiuchi, Youichi Murakami,

Junya Otsuki, Yoshio Kuramoto, Masahumi Kohgi, Keitaro Kuwahara, Hitoshi Sugawara,

Yuji Aoki, Hideyuki Sato,

J. Phys. Soc. Jpn. 77, 063706/1-4 (2008).

7. Sm-Sb Bond Length in a Mixed-Valence System of SmOs4Sb12,

Masami Tsubota, Satoshi Tsutsui, Daisuke Kikuchi, Hitoshi Sugawara, Hideyuki Sato,

Youichi Murakami,

J. Phys.Soc. Jpn. 77, 073601/1-4 (2008).

8. Phase separation in La1-xSrxMnO3+d nanocrystals studied by electron spin resonance,

T. Tajiri, H. Deguchi, S. Kohiki, M. Mito, S. Takagi, M. Mitome, Y. Murakami, and

A. Kohno,



J. Phys.Soc. Jpn. 77, 074715/1-6 (2008).

9. Momentum-resolved charge excitations in high-Tc cuprates studied by resonant inelastic

X-ray scattering,

K. Ishii, M. Hoesch, T. Inami, K. Kuzushita, K. Ohwada, M. Tsubota, Y. Murakami,

J. Mizuki , Y. Endoh, K. Tsutsui, T. Tohyama, S. Maekawa, K. Yamada, T. Masui,

S. Tajima , H. Kawashima, J. Akimitsu,

J. Phys. Chem. Solids, 69, 3118-3124 (2008).

10. Structural Phase Transition in the Spin Gap System YbAl3C3,

Takeshi Matsumura, Toshiya Inami, Masashi Kosaka, Yoshiaki Kato, Takaki Inukai,

Akira Ochiai, Hironori Nakao, Youichi Murakami, Susumu Katano, Hiroyuki S. Suzuki,

J. Phys. Soc. Jpn., 77, 103601/1-4 (2008).

11. Orbital ordering in RVO3 (R=Y, Tb) controlled by hydrostatic pressure,

D. Bizen, K. Nakatsuka, T. Murata, H. Nakao, Y. Murakami, S. Miyasaka, and Y. Tokura,

Phys. Rev. B 78, 224104/1-6 (2008).

12. Field Induced Magnetic Moment Distribution in the Ordered Phase of PrFe4P12,

Kazuaki Iwasa, Lijie Hao, Youichi Murakami, Masahumi Kohgi, Keitaro Kuwahara,

Hitoshi Sugawara, Tatsuma D. Matsuda, Yuji Aoki, Hideyuki Sato, Jean-Michel Mignot,

and Arsen Gukasov,

J. Phys. Soc. Jpn. 77 (2008) Supplement A, 67-71.

13. Magnetic Correlation in the Ordered Phase of CeOs4Sb12,

Kazuaki Iwasa, Shouhei Itobe, Changping Yang, Youichi Murakami, Masahumi Kohgi,

Keitaro Kuwahara, Hitoshi Sugawara, Hideyuki Sato, Naofumi Aso, Takashi Tayama,

and Toshiro Sakakibara,

J. Phys. Soc. Jpn. 77 (2008) Supplement A, 318-320.

14. Crystal Structure and Valence Distribution of [(LaMnO3)m(SrMnO3)m]n Artificial

Superlattices,

Hironori Nakao, Jun Nishimura, Youichi Murakami, Akira Ohtomo,

Tomoteru Fukumura, Masashi Kawasaki, Takashi Koida, Yusuke Wakabayashi, and

Hiroshi Sawa,



J. Phys. Soc. Jpn. 78, 024602/1-10 (2009).

15. Resonant x-ray magnetic diffraction study on successive metamagnetic transitions in

TbB4,

Toshiya Inami, Kenji Ohwada, Yasuhiro H. Matsuda, Zhoungwen Ouyang,

Hiroyuki Nojiri, Takeshi Matsumura, Daisuke Okuyama, Youichi Murakami,

J. Phys. Soc. Jpn. 78, 033707/1-4 (2009).


1. “Establishment of the Condensed Matter Research Center (CMRC)”,

Y. Murakami,

International Symposium of Institute of Materials Structure Science（Oct.16-17, 2008,

Tsukuba, Japan）

2. “Complementary Use of Synchrotron light, Neutron, and Muon”,

Y. Murakami,

Asia Science Seminar on Frontier Science at High-Intensity Proton Accelerators

(Oct.19-25, 2008, Beijing, China)



Name Ken-ichi Hikasa

Department Physics

Position Professor

Research Title Theoretical High Energy Physics


1. We have examined the effects of exchange of massive spin-2 particles which occur in

models with extra dimensions as excitations of gravitons. Calculational methods of

helicity amplitudes containing spin-2 particles are devised. The formalism is applied to

massive graviton exchanges in quark, lepton, gluon scattering processes. The

characteristics of the spin-2 exchanges are found to be seen in the scattering angle

distribution. Four independent couplings are possible in spin-2 exchanges, one of them

being the graviton coupling. It is demonstrated that the graviton coupling can be

distinguished from other possibilities by looking at angular distributions.


1. “Review of Particle Physics”,

C. Amsler, K. Hikasa et. al. (Particle Data Group),

Physics Letters B 667, 1-1340 (2008).


1. “Particle Physics at LHC”,

K. Hikasa,

YONUPA Summer School 2008 (August 22, Tokyo, Japan)

2. “Physics at LHC”,

K. Hikasa,

Tokyo Metropolitan University (November 18-19)



Name Yoshio Kuramoto

Department Physics

Position Professor

Research Title Theory of multipole order and fluctuations in strongly

correlated electrons


1. A New kind of electronic order is investigated theoretically. We argue that octupole and

even higher multipoles can order in skutterudites and other systems with high symmetry

sites. Our model explains naturally magnetic, elastic, and thermodynamic anomalies in

the phase transition where the order parameter has not been identified.

2. The Kondo lattice model is numerically studied with use of newly developed

continuous-time quantum Monte Carlo method. With decreasing temperature, the Fermi

surface of the system evolves from a small one, which involves only conduction electrons,

to a large one where the localized spins behave as itinerant electrons. This result resolves

a long-standing problem how to understand itinerant and localized nature of electrons in

solids.


1. “Magnetic Excitations in Heavy Electron State of Filled Skutterudite PrxLa1-xFe4P12 (x =

1.00 and 0.85)”,

Kazuaki Iwasa, Lijie Hao, Tomoo Hasegawa, Kenji Horiuchi, Youichi Murakami, Junya

Otsuki, Yoshio Kuramoto, Masahumi Kohgi, Keitaro Kuwahara, Hitoshi Sugawara, Yuji

Aoki, and Hideyuki Sato,

J. Phys. Soc. Jpn. 77, 063706-1 - 063706-4 (2008)

2. “Theory of Successive Magnetic Transitions with Tilting of Moments

-Application to NpFeGa5-”,

Annamaria Kiss and Yoshio Kuramoto,

J. Phys. Soc. Jpn. 77, 124708-1 -- 124708-11 (2008)

3. “Electronic Higher Multipoles in Solids”,

Y. Kuramoto,

Prog. Theor. Phys. Suppl. No. 176, 77-96 (2008)



4. “Consequence of Spatial Symmetry on 31P NMR Spectra in PrFe4P12 with Scalar Order”,

Annamaria Kiss and Yoshio Kuramoto,

J. Phys. Soc. Jpn. Suppl. A 77, 72--77 (2008)

5. “Toward Identification of Order Parameters in Skutterudites

--a Wonderland of Strong Correlation Physics--”,

Yoshio Kuramoto and Annamaria Kiss,

J. Phys. Soc. Jpn. Suppl. A 77, 187-192 (2008)

6. “Evolution of a Large Fermi Surface in the Kondo Lattice”,

J. Otsuki, H. Kusunose, Y. Kuramoto,

Phys. Rev. Letters 102, 017202-1 - 017202-2 (2009)

7. “The Kondo Lattice Model in Infinite Dimensions: I. Formalism”,

Junya Otsuki, Hiroaki Kusunose, and Yoshio Kuramoto,

J. Phys. Soc. Jpn. 78, 014702-1 - 014702-12 (2009)

8. “The Kondo Lattice Model in Infinite Dimensions: II. Static Susceptibilities and Phase

Diagram”,

Junya Otsuki, Hiroaki Kusunose, and Yoshio Kuramoto,

J. Phys. Soc. Jpn. 78, 034719-1 - 034719-9 (2009)

9. “Quantum Mechanics”,

Yoshio Kuramoto and Jun'ichi Ezawa,

(Asakura Publishing，2008)


1. “Theoretical Aspects of Physics in Skutterudites”,

Y. Kuramoto,

Skutterudite Meeting (July 11-13, Kashiwa, Japan)

2. “Multipole Ordering in Skutterudites”,

Y. Kuramoto,

Symposium in Annual Meeting of Physical Society of Japan (September 20, Morioka,

Japan)



3. “Evolution of the Fermi surface in strongly correlated electrons”,

Y. Kuramoto,

Colloquim at ETH Zurich (October 1, Zurich, Switzerland)

4. “Role of Higher Electronic Multipoles in the Itinerant-Localized Dichotomy”,

Y. Kuramoto,

Japan-Germany Seminar on "Superconductivity and Magnetism" (September 24-28,

Schloss Ringberg, Germany)


Y. Kuramoto,

Colloquim at University of Cologne (September 26, Cologne, Germany)

6. “Ordering of electronic multipoles in solids”,

Y. Kuramoto,

Symposium at Fudan University (November 13, Shanghai, China)


Y. Kuramoto,

Symposium at University of California Berkeley (February 12, Berkeley, USA)


Y. Kuramoto,

Colloquim at University of Hong Kong (March 11, Hong Kong, China)



Name Yoshiro Hirayama

Department Physics

Position Professor

Research Titles 1. Transport characteristics of semiconductor quantum

systems,

2. Hyperfine interactions and novel NMR (NER),

3. NMR (NER) studies of semiconductor quantum physics,

4. Nanoprobing of quantum physics,

5. Transport characteristics of nano-materials


1. We have studied resistively-detected NMR based on ν = 2/3 electron spin transition.

Especially, we have measured how nuclear spin relaxation occurs by the spin texture called

Skyrmion. We have extended our NMR measurements to quantum wire structures where

electron confinement is quasi-one-dimensional. We also confirmed that circularly polarized

light illumination resulted in very large nuclear spin polarization, where effective nuclear

spin field reached to more than 5 T.

2. We have proposed and demonstrated an alternative nuclear spin resonance using radio

frequency (RF) electric field instead of magnetic field. We call this resonance as NER

(nuclear electric resonance) to distinguish it from a conventional NMR. The proposed NER

is based on the electronic control of electron spins forming a domain structure. The RF

electric field applied to a gate excites spatial oscillations of the domain walls and thus

temporal oscillations of the hyperfine field to nuclear spins. The detailed NER

characteristics, such as RF frequency, RF power, and burst duration dependences, provides

insight into the interplay between nuclear spins and the oscillating domain walls.

3. Using scanning tunneling spectroscopy at low temperature (about 0.3 K) and high

magnetic fields (up to B = 12 T), we have directly probed electronic wave functions across

an integer quantum Hall transition. In accordance with theoretical predictions, we observed

the evolution from localized drift states in the insulating phases to branched extended drift

states at the quantum critical point. Successful nanoprobing of quantum Hall system

becomes a starting point of nanoscale characterization of hyperfine interactions in

semiconductor quantum systems. We also started a transport measurement of nanomaterials

deposited on a nanoscale metal gap.



4. We have studied transport characteristics of SiO2/Si/SiO2 quantum well putting emphasis

on valley, spin and orbit degree of freedoms. By using upper-valley subband edge, we

observed a lifting of the two fold spin degeneracy of conduction-band electrons with

in-plane magnetic field. This is manifest in a splitting of a feature in the conductivity

accompanying the occupation of the upper-valley subband. The splitting increases in

proportion to the in-plane magnetic field, allowing the product of the effective g-factor and

effective mass to be estimated. The obtained value remains constant over wide ranges of

valley splitting, total electron density, and potential bias.

5. We are collaborating with many outside organizations. In all research area, collaboration

with NTT Basic Research Labs is essential. ERATO Nuclear Spin Electronics Project

(NSEP) is also very important for us. In this frame, we work together with researchers

from ERATO-NSEP and collaborate with NTT, Oklahoma Univ., Univ. of Tokyo, and

Niigata Univ. In the framework of Japan-Germany international program, we are

collaborating with NTT and Paul-Drude-Institute at Berlin. In the optical characterization

of semiconductor quantum wells, we enjoyed studies with Chiba Univ. and Tsukuba Univ.

groups. Nanoprobe and nanomaterial studies are carried out in collaboration with Hamburg

Univ., Univ. of Rykyu, and Iwate Univ..


1. “Spin Dynamics of Two-Dimensional Electrons in a Quantum Hall System Probed by

Time-Resolved Kerr Rotation Spectroscopy”,

D. Fukuoka., T. Yamnazaki., N. Tanaka, K. Oto, K. Muro, Y. Hirayama, N. Kumada and H.

Yamaguchi,

Phys. Rev. B78:041304(R), 2008

2. “Electric Field Induced Nuclear Spin Resonance Mediated by Oscillating Electron Spin

Domains in GaAs-Based Semiconductors”,

N. Kumada, T. Kamada, S. Miyashita, Y. Hirayama and T. Fujisawa,

Phys. Rev. Lett. 101:137602, 2008

3. “Evidence of a Transition from Nonlinear to Linear Screening of a Two-Dimensional

Electron System Detected by Photoluminescence Spectroscopy”,

M. Yamaguchi, S. Nomura, T. Maruyama, S. Miyashita, Y. Hirayama, H. Tamura, and T.

Akazaki,



Phys. Rev. Lett. 101:207401, 2008

4. “Quantum Hall Transition in Real Space: From Localized to Extended States”,

K. Hashimoto, C. Sohrmann, J. Wiebe, T. Inaoka, F. Meier, Y. Hirayama, R. A. Roemer, R.

Wiesendanger and M. Morgenstern,

Phys. Rev. Lett. 101:256802, 2008

5. “Electron-spin / nuclear –spin interactions and NMR in semiconductors”, [Topical Review]

Y. Hirayama, G. Yusa, K. Hashimoto, N. Kumada, T. Ota, and K. Muraki,

Semicond. Sci. Technol. 24:023001, 2009


1. “Spin and Valley Degree of Freedom in Silicon Quantum Structures” (invited),

Y. Hirayama,

IUMRS-ICEM 2008 Int. Conf. on Electronic Materials, July 28 – August 1(2008), Sydney,

Australia

2. “Electron Spin Texture in a Wire-Like Quantum Hall System Probed by Selectively

Polarized Nuclear Spins”,

T. Kobayashi, T. Ota, N. Kumada, S. Sasaki and Y. Hirayama,

29th International Conference on the Physics of Semiconductors (ICPS 2008), July 27 -

August 1 (2008), Rio de Janeiro, Brazil

3. “Electric-Field-Induced Nuclear Spin Resonance Mediated by the Hyperfine Interaction”,

N. Kumada, T. Kamada, Y. Hirayama, S. Miyashita, and T. Fujisawa,



4. “Impact of long- and short-range disorder on the metallic behavior of 2D systems”

(invited),

W. R. Clarke, C. E. Yasin, A. R. Hamilton, A. P. Micolich, M. Y. Simmons, K. Muraki, Y.

Hirayama, M. Pepper and D. A. Ritchie,





5. “Quantum Transport in closely separated double quantum wires with independent

contacts”,

K. Muraki, H. M. Lee, E. Y. Chang, and Y. Hirayama,



6. “Nuclear-Spin-Based Measurements of Quantum Hall Systems” (invited),

Y. Hirayama,

18th Int. Conf. on High Magnetic Fields in Semiconductor Physics and Nanotechnology

(HMF18), August 3-8 (2008), S. Pedro, Brazil

7. “Electron Spin Imaging in Quantum Hall Devices by Kerr Rotation Measurement”,

K. Oto, R. Inaba, T. Yamada, T. Yamazaki, K. Muro, Y. Hirayama, N. Kumada, and H.

Yamaguchi,



8. “Optical Induced Dynamic Nuclear Spin Polarization in Quantum Hall Regime Observed

by a Time-Resolved Kerr Rotation”,

D. Fukuoka, N. Tanaka, K. Oto, K. Muro, Y. Hirayama, N. Kumada, and H. Yamaguchi,



9. “Selective Nuclear Spin Munipulation at ν = 2/3 Spin Phase Transition”,

S. Watanabe, K. Kumada, K. Hashimoto, and Y. Hirayama,

The 35th International Symposium on Compound Semiconductors (ISCS 2008),

September 21-24 (2008), Rust, Germany

10. “Nuclear spin and electron spin interactions in semiconductor quantum Hall systems”

(invited),

Yoshiro Hirayama,

10th German-Japan Symposium "Collective Quantum-Phenomena in Correlated

Condensed Matter Systems", September 28 – October 1 (2008), Rottach-Egern, Germany

11. “Electrically Controlled Quantum Coherence of Nuclear Spins in GaAs Semiconductor



Nanostructures”,

G. Yusa, K. Muraki, and Y. Hirayama,

CNSI-RIEC Workshop on Nanoelectronics, Spintronics & Phototoronics, October 9 – 10

(2008), Santa Barbara, USA

12. “Nuclear Magnetic and Electric Resonances Based on ν = 2/3 Domain Structure”

(invited),

Yoshiro Hirayama,

CNSI-RIEC Workshop on Nanoelectronics, Spintronics & Phototoronics, October 9 – 10

(2008), Santa Barbara, USA

13. “Spatial Observation of Spin-Resolved Landau Levels on Adsorbate-Induced

Two-Dimensional Electron System”,

K. Hashimoto, C. Sohrmann, J. Wiebe, T. Inaoka, Y. Hirayama, R. A. Roemer, R.


The 2nd

IEEE Nanotechnology Materials and Devices Conference (NMDC2008), October

20 – 22 (2008), Kyoto, Japan

14. “Real-space imaging of the quantum Hall transition”,

K. Hashimoto, C. Sohrmann, J. Wiebe, T. Inaoka, Y. Hirayama, R. A. Roemer, R.


The 13th Advanced Heterostructures and Nanostructures Workshop (AHNW2008),

December 7-12 (2008), Kona, USA

15. “Electron spin imaging in current flowing quantum Hall devices”,

K. Oto, R. Inaba, T. Yamada, K. Muro, Y. Hirayama, N. Kumada, and H. Yamaguchi,



16. “Nuclear spin resonance mediated by oscillating electron spin domains”,

Y. Hirayama, G. Igarashi, S. Watanabe, T. Fujisawa, N. Kumada, and K. Muraki,



17. “Nuclear-spin detection in heterostructures and nanostructures – detection of strains in



GaAs-AlGaAs interface and of nanoscale magnetic field”,

S. Watanabe, S. Sasaki, N. Isogai, Y. Matsumoto, and Y. Hirayama,



18. “Nuclear magnetic resonance and relaxation in semiconductor nanostructures” (invited),

Yoshiro Hirayama,

Symposium on Surface and Nano Science 2009 (SSNS’09), January 27 – 30 (2009),

Shizukuishi, Japan



Name Hirokazu Tamura

Department Physics

Position Professor

Research Title Study of hypernuclei via high precision gamma-ray

spectroscopy


1. Data analysis for the γ-ray spectroscopy experiment at KEK (E556) performed with the

Hyperball Ge detector array has been almost finished. We observed several transitions in

11ΛB and

12ΛC, from which the spin-dependent ΛN interactions have been clarified.

2. We made progress in the preparation for the first hypernuclear γ-ray spectroscopy

experiment at J-PARC (E13). Construction of the new Ge detector array, Hyperball-J, has

started after our R&D studies on the new type of Ge detectors with mechanical cooling

method and the fast PWO counters for background suppression. The magnetic

spectrometer system updated from the previous SKS system (SksMinus) was designed

and various detectors for SksMinus have been developed.


1. “Hypernuclear γ-ray spectroscopy: present status and perspectives”,

H. Tamura, K. Hosomi, T. Koike, Y. Ma, M. Mimori, K. Miwa, T. Ohtani, K. Shirotori,

M. Ukai,

Nucl. Phys. A805, 384－391 (2008).

2. “γ-ray spectroscopy of 16ΛO and

15ΛN hypernuclei via the

16O(K

−,π

−γ) reaction”,

M. Ukai, S. Ajimura, H. Akikawa, D. E. Alburger, A. Banu, R. E. Chrien, G. B. Franklin, J.

Franz, O. Hashimoto, T. Hayakawa, H. Hotchi, K. Imai, T. Kishimoto, M. May, D. J.

Millener, S. Minami, Y. Miura, T. Miyoshi, K. Mizunuma, T. Nagae, S. N. Nakamura, K.

Nakazawa, Y. Okayasu, P. Pile, B. P. Quinn, A. Rusek, Y. Sato, R. Sutter, H. Takahashi, L.

Tang, H. Tamura, K. Tanida, L. Yuan, S. H. Zhou,

Phys. Rev. C77, 054315-1－20 (2008).

3. “Gamma-ray spectroscopy of hypernuclei: recent results and future plans”,

H. Tamura, K. Hosomi, T. Koike, Y. Ma, M. Mimori, K. Miwa, K. Shirotori, M. Ukai,

Nucl. Phys. A 804, 73－83 (2008).



4. “Experimental studies of hypernuclear structure and the ΛN and ΛNN interactions”,

H. Tamura,

AIP Conf. Proc. 1011, 119－128 (2008).

5. “Non-mesonic weak decays of 5ΛHe and

12ΛC hypernuclei using the (π

+,K

+) reactions”,

S. Okada, H. Outa, S. Ajimura, K. Aoki, A. Banu, H. C. Bhang, T. Fukuda, O. Hashimoto,

J. I. Hwang, S. Kameoka, B. H. Kang, E.H. Kim, J.H. Kim, M. J. Kim, T. Maruta, Y.

Miura, Y. Miyake, T. Nagae, M. Nakamura, S. N. Nakamura, H. Noumi, Y. Okayasu, H.

Park, P.K. Saha, Y. Sato, M. Sekimoto, T. Takahashi, H. Tamura, K. Tanida, A. Toyoda, K.

Tsukada, T. Watanabe, H. J. Yim,

AIP Conf. Proc. 1011, 135－139 (2008).

6. “Search for Θ+ via K

+ p → π

+ X reaction with a 1.2-GeV/c K

+ beam”,

K. Miwa, S. Dairaku, D. Nakajima, S. Ajimura, J. Arvieux, H. Fujimura, H. Fujioka, T.

Fukuda, H. Funahashi, M. Hayata, K. Hicks, K. Imai, S. Ishimoto, T. Kameyama, S.

Kamigaito, S. Kinoshita, T. Koike, Y. Ma, T. Maruta, Y. Miura, M. Miyabe, T. Nagae, T.

Nakano, K. Nakazawa, M. Naruki, H. Noumi, M. Niiyama, N. Saito, Y. Sato, S. Sawada, Y.

Seki, M. Sekimoto, K. Senzaka, K. Shirotori, K. Shoji, S. Suzuki, H. Takahashi, T.

Takahashi, T. N. Takahashi, H. Tamura, N. Tanaka, K. Tanida, A. Toyada, T. Watanabe, M.

Yosoi, and R. Zavislak,

Phys. Rev. C77, 045203-1－10 (2008).

7. “The RFIGISOL at Tohoku ISOL”,

Y. Miyashita, T. Wakui, N. Sato, A. Yamazaki, T. Endo, M. Fujita, A. Goto, S. Kinoshita, T.

Koike, Y. Ma, Y. Miura, T. Miyake, T. Nagano, M. Ohguma, T. Sonoda, T. Suzuki, H.

Tamura, E. Tanaka, M. Tateoka, W. Yamashita, M. Ukai, T. Shinozuka,

Nucl. Inst. Meth. B 266, 4498－4501 (2008).


1. “Strangeness at J-PARC”,

H. Tamura,

International Conference on Exotic Atoms and Related Topics (EXA2008) and

International Conference on Low Energy Antiprotons (LEAP2008)

(September 15-19, 2008, Vienna, Austria)



2. “Present Status and Future Prospects of Hypernuclear Physics”,

H. Tamura,

KGU Yokohama Autumn School of Nuclear Physics

(October 9 - 10, 2008, Kanto Gakuin University, Yokohama, Japan)

3. “Strangeness Nuclear Physics”,

H. Tamura,

18th International Conference on Particles And Nuclei (PANIC08)

(November 9-14, 2008, Eilat, Israel)



Name Masahiro Yamaguchi

Department Physics

Position Professor

Research Title Study of theoretical particle physics and early universe


1. Flavor violation in supersymmetric unified theory of particles: We inspect consequences

of the latest B_s mixing phase measurements on lepton flavor violation in a

supersymmetric SU(5) theory. The O(1) phase, preferring a non-vanishing squark mixing,

generically implies tau -> (e + mu) gamma and mu -> e gamma. Depending on the gaugino

and the scalar mass parameters as well as tan beta, the rates turn out to be detectable or

even already excessive, if the RR mass insertion of down-type squarks is nonzero. We find

that it becomes easy to reconcile B_s mixing phase with lepton flavor violation given:

gaugino to scalar squared mass ratio around 1/12, both LL and RR insertions with decent

sizes, and low tan beta.

2. Study of Superpartners in mixied anomaly and moduli mediation of suepersymmetry

breaking: Although the mirage mediation is one of the most plausible mediation

mechanisms of supersymmetry breaking, it suffers from two crucial problems. One is the

mu-/B mu-problem and the second is the cosmological one. The former stems from the

fact that the B parameter tends to be comparable with the gravitino mass, which is two

order of magnitude larger than the other soft masses. The latter problem is caused by the

decay of the modulus whose branching ratio into the gravitino pair is sizable. In this paper,

we propose a model of mirage mediation, in which Peccei-Quinn symmetry is

incorporated. In this axionic mirage mediation, it is shown that the PQ symmetry breaking

scale is dynamically determined around 10^{10-12} GeV due to the supersymmetry

breaking effects, and the mu-problem can be solved naturally. Furthermore, in our model,

the lightest supersymmetric particle (LSP) is the axino, that is the superpartner of the

axion. The overabundance of the LSPs due to decays of modulus/gravitino, which is the

most serious cosmological difficulty in the mirage mediation, can be avoided if the axino

is sufficiently light. The next-LSPs (NLSPs) produced by the gravitino decay eventually

decay into the axino LSPs, yielding the dominant component of the axinos remaining

today. It is shown that the axino with the mass of O(100) MeV is naturally realized, which

can constitute the dark matter of the Universe, with the free-streaming length of the order

of 0.1 Mpc. The saxion, the real scalar component of the axion supermultiplet, can also be



cosmologically harmless due to the dilution of the modulus decay. The lifetime of NLSP

is relatively long, but much shorter than 1 sec., when the big-bang nucleosynthesis

commences. The decay of NLSP would provide intriguing collider signatures.


1. “Sflavor mixing map viewed from a high energy in supersymmetric SU(5)”,

P. Ko, J. Park and M. Yamaguchi,

JHEP 0811, 051 (2008).

2. “Bs mixing phase and lepton flavor violation in supersymmetric SU(5)”,

J. Park and M. Yamaguchi,

Phys. Lett. B670, 356-362 (2009).

3. “Axionic mirage mediation”,

S. Nakamura, K. Okumura and M. Yamaguchi,

Phys. Rev. D77, 225027 (2008).




Name Riichiro Saito

Department Physics

Position Professor

Research Title Optical properties of carbon nanotubes


1. The photo-excited electron and hole form an exciton in single wall carbon nanotube which

is stable even for room temperature. We have developed the computer program for

calculating the exciton energy and wave function. The exciton binding energy depends on

the diameter, chirality, and surrounding materials which modify the effective dielectric

constants. In order to reproduce of resonance Raman spectra observed by the experiment,

we proposed diameter-dependent dielectric constants which reproduce nicely the exciton

energy for a wide region of diameter and the excitation energy.

2. The Raman spectra of in-plane longitudinal optic phonon mode can be modified by the

Fermi energy of the metallic single wall carbon nanotubes, which are understood by the

phonon-softening phenomena (the Kohn anomaly). We have calculated the phonon

self-energy of which real part and imaginary part are given, respectively, by phonon

frequency shift and phonon spectra broadening. The calculated results reproduce the

experimental results of the Raman spectra of electro-chemical doped single wall carbon

nanotubes.


1. Softening of the Radial Breathing Mode in Metallic Carbon Nanotubes,

H. Farhat, K. Sasaki, M. Kalbac, M. Hofmann, R. Saito, M. S. Dresselhaus, J. Kong,

Phys. Rev. Lett. 102, 126804-1-4, (2009).

2. G' band Raman spectra of single, double and triple layer graphene,

J. S. Park, A. Reina, R. Saito, J. Kong, G. Dresselhaus, M. S. Dresselhaus,

Carbon 47, 1303-1310, (2009).

3. A possible buckybowl-like structure of zeolite templated carbon,

H. Nishihara, Q. H. Yang, P. X. Hou, M. Unno, S. Yamauchi, R. Saito, J. I. Paredes, A.

Martinez-Alonso, J. M. D. Tascon, Y. Sato, T. Kyotani,

Carbon 47, 1220-1230, (2009).



4. Strong and stable photoluminescence from the semiconducting inner tubes within double

walled carbon nanotubes,

D. Shimamoto, H. Muramatsu, T. Hayashi, Y. A. Kim, M. Endo, J. S. Park, R. Saito, M.

Terrones, M. S. Dresselhaus,

Appl. Phys. Lett. 94, 083106-1-3, (2009).

5. Pseudospin and deformation-induced gauge field in graphene,

K. Sasaki, R. Saito,

Prog. Theor. Phys. Suppl. 176, 253-278, (2008).

6. Chirality dependent frequency shift of radial breathing mode in metallic carbon

nanotubes,

K. Sasaki, R. Saito, G. Dresselhaus, M. S. Dresselhaus, H. Farhat, J. Kong,

Phys. Rev. B 78, 235405-1-11, (2008).

7. Tight-binding description of the quasiparticle dispersion of graphite and few-layer

graphene,

A. Gruneis, C. Attaccalite, L. Wirtz, H. Shiozawa, R. Saito, T. Pichler, A. Rubio,

Phys. Rev. B 78, 205425-1-16, (2008).

8. Coherent phonon anisotropy in aligned single-walled carbon nanotubes,

K. Kato, K. Ishioka, M. Kitajima, J. Tang, R.Saito, H. Petek,

Nano Lett. 8, 3102-3108, (2008).

9. Relation between peak structures of loss functions of single double-walled carbon

nanotubes and interband transition energies,

Y. Sato, M. Terauchi, Y. Saito, K. Sato, R. Saito,

J. Electron Microsc. 57, 129-132, (2008).

10. Resonant Raman Scattering of Smallest Single-Walled Carbon Nanotubes,

Z. K. Tang, J. P. Zhai, Y. Y. Tong, X. J. Hu, R. Saito, C. T. Chan, P. Sheng,

Phys. Rev. Lett. 101, 047402, (2008).

11. Curvature-induced optical phonon frequency shift in metallic carbon nanotubes,

K. Sasaki, R. Saito, G. Dresselhaus, M. S. Dresselhaus, H. Farhat, J. Kong,



Phys. Rev. B 77, 245441-1-8, (2008).

12. Magnetism as a mass term of the edge states in graphene,

K. Sasaki, R. Saito,

J. Phys. Soc. Japan 77, 054703-1-7, (2008).

13. Aharanov-Bohm effect for the edge states of zigzag carbon nanotubes,

K. Sasaki, M. Suzuki, R. Saito,

Phys. Rev. B 77, 045138-1-6, (2008).


1. Chiraility dependent phonon softening of metallic single wall carbon nanotubes,

R. Saito, K. Sasaki, K. Sato, G. Dresselhaus, M. S. Dresselhaus, H. Farhat, J. Kong,

The 9th International Conference on Sciences and Application of Carbon Nanotubes,

NT08，Le Corum, Montpellier, France, (2008.6.29-7.4)．

2. Dark and bright exciton energies of carbon nanotubes (keynote Lecture) ,

R. Saito, K. Sato, J. S. Park, K. Sasaki, J. Jiang, G. Dresselhaus, M. S. Dresselhaus,

Carbon 2008，Hotel Metropolitan Nagano, (2008.7.13-18)．

3. Dark Excitons of Single Wall Carbon Nanotubes (invited),

R. Saito, K. Sato,

The 5th Japan-Korea Symposium on Carbon Nanotubes，Haeundae Grand Hotel, Busan,

Korea, (2008.11.9-12)．

4. Double Resonance Raman Spectroscopy of Single Wall Carbon Nanotubes,

J. S. Park, R. Saito,


Korea, (2008.11.9-12)．

5. Chirality Dependent Phonon Frequency Shift in Metallic Single Wall Carbon Nanotubes,

K. Sasaki, R. Saito, H Farhat, M. S. Dresselhaus, J. Kong,


Korea, (2008.11.9-12)．



6. Edge states, Electron-phonon interaction and Raman spectroscopy of graphene and

carbon nanotubes (invited talk),

R. Saito,

International Symposium on Graphene Devices, ISGD2008, Aizu University,

(2008.11.17-19).

7. Gauge field for the edge states in grpahene,

K. Sasaki, S. Murakami, R. Saito,

Annual APS March Meeting 2009, Pittsburgh, PA, USA, (2009.3.16-20).

8. Softening of the radial breathing mode in metallic carbon nanotubes,

H. Farhat, K. Sasaki, M. Kalbac, M. Hofmann, R. Saito, M. S. Dresselhaus, J. Kong,

Annual APS March Meeting 2009, Pittsburgh, PA, USA, (2009.3.16-20)．



Name Hitoshi Yamamoto

Department Physics

Position Professor

Research Titles 1. Study of CP invariance and flavor physics at the KEKB

collider using the Belle detector,

2. Planning of the International Linear Collider (ILC)


1. Measurement of the CP violating angle phi3 by the Belle detector using DK modes of B

mesons decays.

2. Study of the IR region for the Super B-factory. In particular, oversaw a student to estimate

the HOM heating of the IR region.

3. Managing the ILD detector as a joint steering board member. Oversaw the process of

unifying the Asia-based GLD detector concept and the Wurope-based LDC detector

concept to form the new detector ILD, and to produce the letter of intent.

4. Managing the ILC experimental program as the Asian representative for the reseqrch

directorate of ILC.

5. Managing the JSPS creative scientific research program for the ILC detector R&D as its PI.


1. “Precision Measurement of Little Higgs Parametesrs at the International Linear Cillider”,

E. Asakawa, M. Asano, K. Fujii, T. Kusano, S. Matsumoto, R. Sasaki, Y.

Takubo, H. Yamamoto,

Physical Review, D79, 2009, 075103-1, 075103-12.

2. “The International Large Detector Letter of Intent”,

ILD concept group,

2009

3. “Fine Pixel CCD for ILC Vertex Detector”,

Y. Takubo, H. Ikeda, K. Itagaki, H. Kouno, A. Miyamoto, T. Nagamine, Y.



Sugimoto, H. Suzuki, H. Yamamoto,

Proceedings of the 17th International Workshop on Vertex Detectors 2008, 2008.

4. “Readout ASIC for ILC FPCCD Detector”,

Y. Takubo, A. Miyamoto, H. Ikeda, H. Yamamoto, K. Itagaki, T. Nagamine, Y. Sugimoto,

Proceedings of the International Conference on Technology and Instrumentation in

Particle Physics 2009, 2008.

5. “Development of Readout ASIC for FPCCD Vertex Detector”,

Y. Takubo, H. Ikeda, K. Itagaki, A. Miyamoto, T. Nagamine, Y. Sugimoto, H. Yamamoto,

Proceedings of the International Linear Collider Workshop 2008, arXive:0901.3427

[physics.ins.det], 2008.

6. “R&D status of FPCCD VTX”,

Y. Sugimoto, H. Ikeda, A. Miyamoto, T. Nagamine, Y. Takubo, H. Yamamoto,

Proceedings of the International Linear Collider Workshop 2008, arXive:0902.2067

[physics.ins.det], 2008.

7. “Search for resonant B+- to K+- h to K+- gamma gamma Decays at Belle”,

K. Abe et al. (Belle collaboration),

Physics Letters, B662, 323, 2008.

8. “Measurement of the ratio B(D0 to pi+ pi- pi0) / B(D0 to K- pi+ pi0)”,



9. “Search for lepton flavor violating tau decays into three leptons”,



10. “Observation of a resonance-like structure in the pi+- psi-prime mass distribution in

exclusive B to K pi+- psi-prime decays”,


Physical Review Letters, 100, 42001, 2008



11. “Search for anti-B0 to Lambda+(c) Lambda-(c) decay at Belle”,


Physical Review, D77, 051101, 2008.


1. “Workshop Charge”,

H. Yamamoto,

ACFA Physics and Detector Workshop, 2008.3.17, Tsukuba Japan.

2. “Workshop Charge”,

H. Yamamoto,

International Linear Collier Workshop 2008, 2008.11.16, Chicago, USA

3. “Detectors for a Linear Collider”,

H. Yamamoto,

The 9th ICFA Seminar, 2008.10.30, Stanford, USA

4. “Status of ILC Experimental Program”,

H. Yamamoto,

EUDET Annual Meeting 2008, 2008.10.7, NEKHEF, Amsterdam, Netherland



Name Toshihiro Kawakatsu

Department Physics

Position Professor

Research Title Study on Structure and Dynamics of Soft Matter


1. Phase Transition of Domain Structures in a Thin Layer of Block Copolymer;

Using the dynamic self-consistent field (SCF) theory, we investigate the transition of

domain morphology of a block copolymer confined in a thin layer. We prepare a

hexagonally-perforated lamellar (HPL) structure in the layer, and imposed an external

electric field, which induces a transition from HPL phase to cylindrical phase.

Depending on the direction of the electric field, we observe different kinetic pathways

[Ref.4].

2. Dynamic Self-Consistent Field Theory with Hydrodynamics;

We coupled SCF theory with hydrodynamic motion described by Navier-Stokes

equation. We observe an acceleration of the coarsening of the domains formed upon

microphase separation due to the hydrodynamic interactions. Such a hydrodynamic

interaction, moreover, tends to align the domains, leading to a well-ordered microphase

domain structure. We also observe that such a long-range ordering can not be found

in complex tricontinuous network domains such as a gyroid structure [Ref.3].

3. Transition of Domain Morphology in Chemically Reacting Polymer Systems;

We study morphology transition of a block copolymer where polymerization reaction

takes place. We model this process using time-dependent Ginzburg-Landau equation.

Simulation results show interesting non-equilibrium domain morphologies [Ref.1].

4. Development of Control Methods of Modular Robots;

We proposed a control mechanism of modular robots on the basis of a well-balancing

of mechanical body system and neural control system. Simulation results on

serpentine robots show an importance of a well-designed body dynamics [Ref.5-6].


1. “Transition in Domain Morphology of Block Copolymer Undergoing Polymerization”,

Y.Iida, T.Kawakatsu, R.Motokawa, S.Koizumi, and T.Hashimoto,



Macromolecules, 41 (No.24) 9722-9726, (2008).

2. “Three-Dimensional Visualization of a Single Block Copolymer in Lamellar

Nanodomains”,

H.Morita, T.Kawakatsu, M.Doi, T.Nishi, and H.Jinnai,

Macromolecules, 41 (No.13) 4845-4849, (2008).

3. “Hydrodynamic Effects on the Disorder to Order Transitions of Diblock Copolymer

Melts”,

T.Honda and T.Kawakatsu;,

J. Chem. Phys., 129 (No.11) 114904-1 - 114904-8, (2008).

4. “Hexagonally Perforated Lamella-to-Cylinder Transition in a Diblock Copolymer Thin

Film under Electric Field”,

D.Q.Ly, T.Honda, T.Kawakatsu, and A.Zvelindovsky,

Macromolecules, 41 (N0o.12) 4501-4505, (2008).

5. “Emergent Morphology Control of a Modular Robot by Exploiting the Interaction

between Control and Mechanical Dynamics”,

M.Shimizu, M.Takahashi, T.Kawakatsu, and A.Ishiguro,

in “DISTRIBUTED AUTONOMOUS ROBOTIC SYSTEMS 6 (Eds. R. Alami et al.),

pp.23-32, (Springer, iSMi, 2008)

6. “Rapid and Cheap Learning by Exploiting Biarticular Muscles - A Case Study with a

Two-Dimensional Serpentine Robot —”,

W.Watanabe, T.Kawakatsu and A.Ishiguro,

Advanced Robotics, 22 (No.15), 1683-1696, (2008).


(Invited talks only)

1. “Dynamics of Structural Phase Transition of Polymeric Mesophases”,

D.Q.Ly, T.Honda, T.Kawakatsu and A.V.Zvelindovsky,

The IUMRS International Conference in Asia 2008, (Dec.9-13, Nagoya Congress

Center, Nagoya, Japan).



2. “Development of Dynamic Density Functional Theories of Multiphase Dense Poly

meric Systems”,

T.Kawakatsu,

IMA Annual Program Year Workshop on “Development and Analysis of Multisca

le Methods”, (Nov. 3-7, Institute for Mathematics and its Applications (IMA), Uni

versity of Minnesota, Minneapolis, U.S.A.).

3. “Structure and Dynamics of Mesophases of Polymeric Nanomaterials”,

T.Kawakatsu,

“Fudan-Tohoku Joint Workshop”, (Nov. 13-14, Department of Physics, Fudan Uni

versity, Shanghai, P.R.China).

4. “Dynamics and rheology of phase transitions in polymer systems”,

D.Q.Ly, T.Hondai, T.Kawakatsu, and A.V.Zvelindovsky,

“International Symposium on Non-Equilibrium Soft Matter”, (June 2-5, Shiran Kai

kan, Kyoto, Japan).

5. “Dynamic Self-Consistent Field Theory for Dense Polymer Systems under External

Fields and Constraints”,

D.Q.Ly, T.Hondai, T.Kawakatsu, and A.V.Zvelindovsky,

“Workshop on Multiscale Modeling of Complex Fluids”, (May 26-30, Beijing Inte

rnational Center for Mathematical Reserach, Beijing, P.R. China).



Name Hajime Shimizu

Department Physics (Laboratory of Nuclear Science)

Position Professor

Research Title Study of Quark Nuclear Physics with a Photon Beam.


1. We have finished construction in 2008 of a 4p electro-magnetic calorimeter, FOREST,

which is the main detector system in this project. (It took about 2 years for construction of

FOREST.)

2. We developed a new data acquisition system so as to take data with a high trigger rate such

as 2kHz with a good efficiency of about 80%.

3. Data taking started in fall, 2008. We detect typically 2M p0 and 40k h mesons per day.


1. “Forward coherent φ-meson photoproduction from deuterons near threshold”,

W.C. Chang et. al.,

Phys. Lett. B658(2008)209-215.

2. “Cross Sections and Beam Asymmetry for K+Σ*-

Photoproduction

from the Deuteron at Eγ=1.5–2.4 GeV”,

K. Hicks et al.,

Phys. Rev. Lett. 102(2009)012501.

3. “Evidence for the Θ+ in the γ d → K+

K-pn reaction by detecting K

+K- pairs”,

T. Nakano et al.,

Phys. Rev. C79(2009)025210.


1. “Quark Nuclear Physics at LNS, Sendai”,

H. Shimizu,

The 1st GCOE International Symposium “Weaving Science Web beyond Particle-Matter

Hierarchy”, March 5-7 2009, Tohoku University, Sendai.



Name Yasuhiro Sakemi

Department Physics (Cyclotron and Radioisotope Center)

Position Professor

Research Title Study of the violation of time reversal invariance with the

search for electron electric dipole moment measurements.


1. The electron Electric Dipole Moment (EDM) is sensitive observable to study the violation

of time reversal invariance and the fundamental symmetry and interaction beyond the

standard model such as the super symmetry. We focus on the heaviest alkali atom of

francium (Fr) to search for the electron EDM, since the Fr has a valence electron whose

EDM is enhanced by a factor ~αZ3 with the relativistic effect and its enhancement factor is

maximum (~1150). By using the laser cooling and trapping technique (MOT:

Magneto-Optical Trap) to produce the BEC state, the Fr atom can be trapped at the

localized region in the vacuum cell, and this MOT will decrease the systematic error due to

the small fluctuation of applied electric field for EDM measurement drastically. We

developed the external cavity laser diode (ECLD) and taper amplifier (TA) for the light

source to trap the neutral atom, which is main component of the MOT.

2. To achieve the high precision measurement of EDM, the high rate production of

radioactive isotope Fr is important. We developed the surface ionizer to produced and

extract the Fr with nuclear fusion reaction. The surface ionizer consists from the target rod

whose head is covered with the gold of the thickness 50 um, which is used as the target to

produce the Fr with the reaction of 18

O (beam) + 197

Au (target) → 210

Fr+5n. The target rod

is surrounded by the oven, which is heated just before the melting point of the gold to

extract the Fr ion with the thermal diffusion from the surface of the target. The beam

emittance can be defined by the diameter size of the extraction electrode configured on the

oven. We installed the developed surface ionizer at the 34 course in the CYRIC, Tohoku

University, and it was tested with the 18

O beam from AVF cyclotron. The Fr is successfully

produced and extracted from the surface ionizer for the first time at CYRIC, and the

extraction efficiency is estimated with less than 1 %.


1. “Study of energy dependence of pion production by proton on copper target near

350-MeV.”,



E.V. Karpechev,A.B. Kurepin, Y.Sakemi et al. 2008. 8pp.

Published in Phys.Atom.Nucl.71:1-8,2008.

2. “Nuclear structure relevant to neutrinoless double beta decay: The valence protons in

Ge-76 and Se-76.”,

B.P. Kay, J.P. Schffer, Y.Sakemi et al. Oct 2008. 4pp.

Published in Phys.Rev.C79:021301,2009.

3. “Complete set of polarization transfer coefficients for the He-3 (p, n) reaction at 346 MeV

and 0 degrees.”,

T. Wakasa, E.Ihara, Y.Sakemi et al. May 2008. 6pp.

Published in Phys.Rev.C77:054611,2008.


1. “Present status of the experimental plan to search for the Fr EDM”,

Y. Sakemi,

G-COE/CYRIC workshop “Fundamental Physics using atoms” （Aug.18-19 Sakunami,

Sendai, Japan)

Workshop URL: http://cycgw1.cyric.tohoku.ac.jp/~sakemi/fundamental/index.html



Name Taka-hisa Arima

Department Physics (Institute of Multidisciplinary Research for Advanced

Materials)

Position Professor

Research Title Study of Interplay between Magnetism and Ferroelectricity in

Transition-metal Oxide Compounds


1. A spin-polarized neutron diffraction study on a magnetic ferroelectric MnWO4 has been

performed. The direction of electric polarization controls the sense of helix that can be

detected from the difference in intensities of magnetic satellites for parallel and antiparallel

spin directions of incident neutrons with respect to a scattering vector. The temperature

dependence of the difference agrees well with that of the electric polarization. These results

corroborate that an inverse effect of a Dzyaloshinskii-Moriya interaction is the origin of the

spontaneous electric polarization in the spiral phase of MnWO4.

2. The relation between the orientation of the magnetic field and the flopped ferroelectric

polarization has been investigated for multiferroic MnWO4. The ferroelectric

single-domain state is retained across the polarization flop process when the direction of

the applied magnetic field slightly deviates from the b axis within the ab plane.

Furthermore, the electric polarization in the high-field P//a phase is reversed when the

P//b-to-P//a transition takes place while decreasing and increasing the magnetic fields

oppositely canted from the b axis. These results indicate that the symmetry breaking

induced by a canted magnetic field determines the direction of the polarization flop, which

corresponds to the direction of the vector spin chirality. The stability of the magnetoelectric

domain walls in a canted magnetic field play a key role in the directional control of the

electric polarization flop phenomenon.

3. We succeeded in inducing crystallographic chirality in a noncentrosymmetric canted

antiferromagnet CuB2O4 by application of a low intensity static magnetic field. The

chirality is reversed by a 90-degree rotation of the direction of the magnetic field. The

induction of chirality by a magnetic field gives rise to a gigantic enhancement of

magnetochiral dichroism in this material.

4. We have found that one can control linear birefringence with a first-order optical



magneto-electric effect in CuB2O4. The effect can provide a new type of phase retarder,

which is magnetically controllable and propagation-direction dependent.


1. “Phase-Sensitive Observation of a Spin-Orbital Mott State in Sr2IrO4”,

B. J. Kim, H. Ohsumi, T. Komesu, S. Sakai, T. Morita, H. Takagi, T. Arima,

Science 323, 1329-1332 (2009).

2. “Electrical control of in-plane anisotropy in charge-orbital ordered state of single-layered

manganite La1/2Sr3/2MnO4”,

Shota Konno, Kouji Taniguchi, Hajime Sagayama, Taka-hisa Arima,

Appl. Phys. Express 2, 033004(1)-(3) (2009).

3. “Imaging of variation in charge/orbital/spin ordering structure in Sm1-xSrxMnO3

(x=0.55 and 0.6)”,

X. Z. Yu, Y. Tomioka, T. Asaka, K. Kimoto, T. Arima, Y. Tokura, Y. Matsui,

Appl. Phys. Lett. 94, 082509(1)-(3) (2009).

4. “Insulator-metal phase transition of Pr0.6Ca0.4MnO3 studied by x-ray absorption

spectroscopy in pulsed magnetic fields”,

Z. W. Ouyang, Y. H. Matsuda, H. Nojiri, Y. Inada, Y. Niwa, T. Arima,

J. Phys.: Cond. Matter 21, 016006(1)-(5) (2009).

5. “Electric-Dipole Active Two-Magnon Excitation in ab Spiral Spin Phase of a

Ferroelectric Magnet Gd0.7Tb0.3MnO3”,

N. Kida, Y. Yamasaki, R. Shsimano, T. Arima, Y. Tokura,

J. Phys. Soc. Jpn. 77, 123704(1)-(4) (2008).

6. “Magnetically Controllable CuB2O4 Phase Retarder”,

M. Saito, K. Ishikawa, K. Taniguchi, T. Arima,

Appl. Phys. Express 1, 121302(1)-(3) (2008).

7. “Control of the Magnetoelectric Domain-Wall Stability by a Magnetic Field in a

Multiferroic MnWO4”,

K. Taniguchi, N. Abe, H. Umetsu, H. Aruga Katori, T. Arima,



Phys. Rev. Lett. 101, 207205(1)-(4) (2008).

8. “Magneto-electric optics in non-centrosymmetric ferromagnets”,

T. Arima,

J. Phys.: Cond. Matter 20, 434211(1)-(9) (2008).

9. “Evidence for an Electric-Dipole Active Continuum Band of Spin Excitations in

Multiferroic TbMnO3”,

Y. Takahashi, N. Kida, Y. Yamasaki, J. Fujioka, T. Arima, R. Shimano, S. Miyahara, M.

Mochizuki, N. Furukawa, Y. Tokura,

Phys. Rev. Lett. 101, 187201(1)-(4) (2008).

10. “Effects of uniaxial stress on orbital stripe direction in half-doped layered manganites:

Eu0.5Ca1.5MnO4 and Pr(Sr,Ca)2Mn2O7”,

Y. Tokunaga, R. Kumai, N. Takeshita, Y. Kaneko, J. P. He, T. Arima, Y. Tokura,

Phys. Rev. B 78, 155105(1)-(7) (2008).

11. “Magnetic Control of Crystal Chirality and the Existence of a Large Magneto-Optical

Dichroism Effect in CuB2O4”,


Phys. Rev. Lett. 101, 117402(1)-(4) (2008).

12. “Electrically driven spin excitation in the ferroelectric magnet DyMnO3”,

N. Kida, Y. Ikebe, Y. Takahashi, J. P. He, Y. Kaneko, Y. Yamasaki, R. Shimano, T. Arima,

N. Nagaosa, Y. Tokura,

Phys. Rev. B 78, 104414(1)-(9) (2008).

13. “Effect of Quenched Disorder on Charge Ordering Structure in RE1.67AE0.33NiO4 (RE

= La, Pr, Nd, Sm; AE = Ca, Sr)”,

X. Z. Yu, T. Arima, S. Seki, T. Asaka, K. Kimoto, Y. Tokura Y. Matsui,

J. Phys. Soc. Jpn 77, 093709(1)-(4) (2008).

14. “Magnetic-Field-Induced Ferroelectric State in DyFeO3”,

Y. Tokunaga, S. Iguchi, T. Arima, Y. Tokura,

Phys. Rev. Lett. 101, 097205(1)-(4) (2008).



15. “Cycloidal Spin Order in the a-Axis Polarized Ferroelectric Phase of Orthorhombic

Perovskite Manganite”,

Y. Yamasaki, H. Sagayama, N. Abe, T. Arima, K. Sasai, M. Matsuura, K. Hirota, D.

Okuyama, Y. Noda, Y. Tokura,

Phys. Rev. Lett. 101, 097204(1)-(4) (2008).

16. “Correlation between ferroelectric polarization and sense of helical spin order in

multiferroic MnWO4”,

H. Sagayama, K. Taniguchi, N. Abe, T. Arima, M. Soda, M. Matsuura, K. Hirota,

Phys. Rev. B 77, 220407R(1)-(4) (2008).

17. “Structural and Magnetic Properties of Spinel FeV2O4 with Two Ions Having Orbital

Degrees of Freedom”,

T. Katsufuji, T. Suzuki, H. Takei, M. Shingu, K. Kato, K. Osaka, M. Takata, H. Sagayama,

T. Arima,

J. Phys. Soc. Jpn. 77, 053708(1)-(4) (2008).

18. “Optical detection of the rotation of orbital stripes in a charge-orbital ordered bilayer

manganite at half-doping”,

Y. S. Lee, Y. Tokunaga, T. Arima, Y. Tokura,

Physica B 403, 1579-1581 (2008).


1. “Multiferroic states in perovskite type orthoferrites”,

Y. Tokunaga, S. Iguchi, Y. Taguchi, T. Arima, Y. Tokura,

American Physical Society 2009 March Meeting, Pittsburgh, 2009/3/20.

2. “Electric control of direction of orbital stripes in charge-orbital ordered state of

single-layered manganite La1/2Sr3/2MnO4”,

S. Konno, K. Taniguchi, H. Sagayama, T. Arima,


3. “Mechanism of Spontaneous Electric Polarization Flop in TbMnO3”,

H. Sagayama, N. Abe, T. Arima, K. Iwasa,




4. “Magnetic control of crystal chirality and gigantic magneto-chiral effect in CuB2O4”,



5. “Low-magnetic field control of electromagnon”,

N. Kida, S. Ishiwata, Y. Taguchi, R. Shimano, T. Arima, Y. Tokura,


6. “Lattice-form dependent charge- and orbital- ordered states in perovskite-related

manganites”,

D. Okuyama, Y. Tokunaga, R. Kumai, Y. Taguchi, T. Arima, Y. Tokura,


7. “Effect of the substrate on the orbital phase transition in a manganite thin film under

magnetic field”,

Y. Wakabayashi, H. Sagayama, T. Arima, Y. Nakamura, Y. Ogimoto, K. Miyano, H. Sawa,


8. “LS separation of J=1/2 Mott insulator observed by magnetic X-ray diffraction”,

S. Fujiyama, B.J. Kim, H. Ohsumi, T. Komesu, D. Hirai, K. Ohashi, S. Sakai, T. Arima, H.

Takagi,


9. “Magnetostriction and magnetodielectric property in Mn3O4”,

H. Umetsu, N. Abe, K. Taniguchi, H. Sagayama, T. Arima,

2009AIST-RIKEN Joint WS 'Emergent Phenomena of Correlated Materials', Nago,

2009/3/5.

10. “Domain Control in Orbital-Ordered Systems”,

T. Arima,


2009/3/5.

11. “Electrical control of direction of orbital stripes in charge-orbital ordered state of a

single-layered manganite La1/2Sr3/2MnO4”,



S. Konno, K. Taniguchi, H. Sagayama, T. Arima,


2009/3/5.

12. “TEM observations of nanostructures formed near phase transformation temperatures”,

Y. Murakami, D. Shindo, R. Kainuma, T. Arima,

Jim Krumhansl Symposium 2008, Osaka, 2008/11/10.

13. “Optical Magnetoelectric Effects in a Noncentrosymmetric Magnet CuB2O4”,

T. Arima , M.Saito , K.Taniguchi,

The International Symposium on Anomalous Quantum Materials 2008, Tokyo, 2008/11/9.

14. “Selective rotation of electric polarization direction in magneto electric multiferroic

TbMnO3”,

N. Abe ,K. Taniguchi ,S. Ohtani ,H. Umetsu , T. Arima,


15. “Crystallographic Chirality in CsCuCl3 Investigated by Resonant Circularly-polarized

X-ray Scattering”,

Y. Kousaka, H. Ohsumi, T. Komesu, T. Arima, S. Sakai, M. Akita, K. Inoue, T. Yokobori,

Y.Nakano, E. Kaya, J. Akimitsu,


16. “Ferroelectric polarization control with a low magnetic field in a multiferroic Y-type

hexaferrite Ba2Mg2Fe12O22”,

K. Taniguchi, N. Abe, H, Sagayama, S. Ohtani, H.Umetsu, T. Arima,


17. “Correlation between Ferroelectric Polarization and Sense of Helical Spin Order in

Multiferroic MnWO4”,

H. Sagayama, K. Taniguchi, N. Abe, T. Arima, M. Soda, M. Matsuura, K.Hirota,


18. “Low-magnetic field control of electromagnon at THz frequencies in a ferroelectric

helimagnet”,



N. Kida, S. Ishiwata, Y. Taguchi, R. Shimano, T. Arima, Y, Tokura,


19. “Accurate stucture analysis of DyMnO3 single crystal utilizing high flux xrays and a

large cylindrical imaging plate at SPring-8”,

D. Okuyama, S. Aoyagi, K. Sugimoto, C. Moriyoshi, H. Ohsumi, C-H. Shih, H.

Okabayashi, R. Satou, T. Hashimoto, Y. Kuroiwa, H. Sawa, E.Nishibori, M. Takata,

Y.Taguchi, T. Arima, Y.Kaneko, Y. Tokura,


20. “Dynamical magnetoelectric effects in oxide multiferroics”,

Y. Tokura , F. Kagawa ,H. Murakawa ,Y. Onose ,N. Kida ,Y. Takahashi ,Y. Kaneko ,S.

Ishiwata ,Y. Taguchi ,R. Shimano, T.Arima,

The International Symposium on Anomalous Quantum Materials, Tokyo, 2008/11/9.

21. “Multiferroic state and large electric polarization in DyFeO3 single crystal”,

Y. Tokunaga, S. Iguchi, T. Arima, Y. Tokura,


22. “Synchrotron X-ray Studies on Magnetic Order”,

T. Arima,

Institute of Materials Structure Science Symposium '08, Tsukuba, 2008/10/16.

23. “Neutｒon and X-ray Diffraction Studies on Spin-driven Ferroelectrics”,

T. Arima,

The 7th International Workshop on Polariｚ ed Neutrons in Condensed Matter

Investigations, Tokai, 2008/9/2.

24. “Flipping ratio in circularly polarized X-ray diffraction”,

T. Morita, H. Ohsumi, T. Komesu, S. Sakai, T. Arima, I. Takahashi, Y. Nishino, K.

Tamasaku, Y. Tanaka, T. Ishikawa, M. Takata,

21st Congress and General Assembly of International Union of Crystrallography, Osaka,

2008/8/28.

25. “Development of a polarization rotator for X-ray magnetic diffraction”,



H. Ohsumi, S. Sakai, T. Morita, T. Komesu, T. Arima, Y. Nishino, K. Tamasaku, T.

Ishikawa, M. Takata,

21st Congress and General Assembly of International Union of Crystallography, Osaka,

2008/8/28.

26. “Electrostatic potential analysis of the orbital-ordered phase of spinel oxide FeCr2O4

using convergent-beam electron diffraction”,

D. Morikawa, K. Tsuda, S. Ohtani and T. Arima,


2008/8/26.

27. “Modulated crystal structure of RE1.67AE0.33NiO4 in charge ordering state”,

X. Z. Yu, T. Arima, S. Seki, T. Asaka, T. Nagai, T. Hara, K. Kimoto, Y. Tokura, and Y.

Matsui,


2008/8/26.

28. “Inelastic x-ray scattering study of phonons in the multiferroic compound TbMnO3”,

R. Kajimoto, H. Sagayama, K. Sasai, T. Fukuda, S. Tsutsui, T. Arima, K. Hirota, Y. Mitsui,

H. Yoshizawa, A.Q. Baron, Y. Yamasaki, and Y. Tokura,

25th international conference on Low Temperature Physics, Amsterdam, 2008/8/11.



Name Kazuyoshi Yamada

Department Physics (WPI - Advanced Institute for Material Research)

Position Professor

Research Title Study of novel properties on strongly correlated electron

systems by using neutron scattering


1. Structural and spectroscopic neutron scattering studies have been performed for high

temperature superconducting materials, two dimensional cupper oxides and iron-based

oxicipnictides. For the former, spin excitation spectra have been studied over a wide

doping concentration range for both electron-doped (n-type) and hole-doped (p-type)

superconductors. As the result we clarified a clear interrelation between the spin excitation

and superconductivity in this system. For the latter, by structural analyses we clarified an

intimate relation between the Fe-As bond-angle and superconducting transition

temperature, which provides an important key for elucidation of this system.

2. Dynamical spin molecules in the geometrically frustrated magnets have been studied by

neutron scattering. We found interesting magnetic excitation signals at discreet energy

levels. The q-dependences of intensity of these magnetic excitations strongly dependent on

the energy level and are almost perfectly reproduced by introducing spin molecules with

the energy dependent shape in which spin correlation is confined. This observation

introduced a new concept of dynamical spin molecule in the geometrically frustrated

magnets.


1. “Effect of Structural Parameters on Superconductivity in Fluorine-Free LnFeAsO1-y (Ln =

La, Nd)”,

C.H Lee, A. Iyo, K. Yamada and et al.,

J. Phys. Soc. Jpn 77, 087304-1 - 083704-4, (2008)

2. “Molecular Spin Resonance in the Geometrically Frustrated Magnet MgCr2O4 by

Inelastic Neutron Scattering”,

K. Tomiyasu, H. Suzuki, K. Yamada and et al.,

Phys. Rev. Lett. 101, 177401-1 – 177401-4, (2008)



3. “Search of Long-Range Magnetic Ordering in Superconducting Five-Layered Cuprate”,

C.H. Lee, A. Iyo, K. Yamada, and et al.,

J. Phys. Soc. Jpn 77, 073706-1 - 07 3706-3, (2008)

4. “Low-Energy Spin Fluctuations in the Ground States of Electron-Doped

Pr1-xLaCexCuO4+δ Cuprate Superconductors”,

M. Fujita, M. Matsud, K. Yamada and et al.,

Phys. Rev. Lett. 101, 107003-1- 107003-4, (2008)

5. “Similar Glassy Features in the 139

La NMR Response of Pure and Disordered

La1.88Sr0.12CuO4”,

V. F. Mitrović, M.-H. Julien, K. Yamada and et al.,

Phys. Rev. B 78, 014504-1 - 014504-7, (2008)

6. “Magnetic Dispersion of the Diagonal Incommensurate Phase in Lightly Doped

La2-xSrxCuO4”,

M. Matsuda, M. Fujita, K. Yamada and et al.,

Phys. Rev. Lett. 101, 197001-1-197001-4, (2008)

7. “Resonance-Like Magnetic Excitations in Spinel Ferrimagnets FeCr2O4 and NiCr2O4

Observed by Neutron Scattering”,

K. Tomiyasu, K. Yamada and et al.,

J. Phys. Soc. Jpn. 77, 124703-1 - 124703-5, (2008)


1. “What Clarified by Neutron by Neutron Scattering in High-Tc Research”,

K. Yamada,

The Fourth Biennial American Conference on Neutron Scattering, (May 11-15, 2008,

Santa Fe, U.S.A.)

2. “Complementary use of Neutron Scattering and µSR for high-Tc Research”,

K. Yamada,

11th International Conference on Muon Spin Rotation, Relaxation and Resonace, (July

21-25, 2008, Tsukuda, Japan)



3. “Neutron and X-ray scattering study on cuprate superconductors”,

K. Yamada,

Miniworkshop on Strong Correlations in Materials and Atom Traps, (August 4-15, 2008,

Trieste, Italy)

4. “Towards deeper understanding of cuprate superconductors - role of polarized neutron

scattering –“,

K. Yamada,

The 7th International Workshop on Polarized Neutron in Condensed Matter Investigations,

(Sep. 1-5, 2008, Tokai, Japan)

5. “Impurity-effect on spin, charge and lattice fluctuations in cuprate superconductors”,

K. Yamada, H. Hiraka, M. Fujita and M. Enoki,

The 2nd International Symposium on Anomalous Quantum Materials (ISAQM2008) and

the 7th Asia-Pacific Workshop, (Nov. 7-10, 2008, Tokyo, Japan)



Name Takashi Takahashi


Position Professor

Research Title Ultrahigh-resolution photoemission study of graphene and

novel superconductors.


1. We have performed high-resolution angle-resolved photoemission spectroscopy (ARPES)

of graphite intercalation compound C6Ca, and succeeded for the first time in directly

observing the superconducting gap. The present experimental result unambiguously

establishes that the interlayer band has an essential role for the high-Tc superconductivity in

C6Ca.

2. We have performed high-resolution ARPES on a newly-discovered iron-based high-Tc

superconductor, and have determined for the first time the detailed momentum dependence

of the superconducting gap. The experimental result indicates the nodeless s-wave

pairing symmetry and the importance of an interband scattering in iron-based

superconductors.

3. We have developed a new low-energy ultraviolet light source “Xenon plasma discharge

lamp”. By using this lamp together with the home-built ultrahigh-resolution ARPES

spectrometer, we have reveled several key issues on high-Tc cuprate superconductors, such

as the pairing origin of the pseudogap and the many-body interactions responsible for the

occurrence of superconductivity.


1. Effect of Zn impurities on the electronic structure of La1.85Sr0.15CuO4 studied by

high-resolution angle-resolved photoemission spectroscopy,

K. Terashima, T. Sato, K. Nakayama, T. Arakane, T. Takahashi, M. Kofu, and K. Hirota,

Phys. Rev. B 77 092501-1-4, (2008).

2. Cooperative structural and Peierls transition of Indium chains on Si(111) surface,

Y. J. Sun, S. Agario, S. Souma, K. Sugawara, Y. Tago, T. Sato, and T. Takahashi,

Phys. Rev. B 77, 125115-1-4 (2008).



3. Low-energy excitations in graphite studied by ultrahigh-resolution angle-resolved

photoemission spectroscopy,

K. Sugawara, T. Sato, S. Souma, T. Takahashi, and H. Suematsu,

Physica B 403 1531-1533 (2008).

4. Universal character of CoO2 plane studied by high-resolution angle-resolved

photoemission,

T. Arakane, T. Sato, T. Takahashia, H. Ding, T. Fujii and A. Asamitsu,

Physica B 403 1086-1088 (2008).

5. Band structure and Fermi surface of heavy Fermion compounds Ce2TIn8 (T=Co,Rh,In)

studied by angle-resolved photoemission spectroscopy,

S. Souma, S. Ra j, J. C. Campuzano, T. Sato, T. Takahashi, S. Ohara, and S. Sakamoto,

Physica B 403 752-754 (2008).

6. Doping induced evolution of Fermi surface in low carrier superconductor Tl-doped PbTe,

K. Nakayama, T. Sato, T. Takahashi, and H. Murakami,

Phys. Rev. Lett. 100 227004-1-4 (2008).

7. Superconducting Gap and Pseudogap in Iron-Based Layered Superconductor

La(O1-xFx)FeAs,

T. Sato, S. Souma, K. Nakayama, K. Terashima, K. Sugawara, T. Takahashi, Y. Kamihara,

M. Hirano, and H. Hosono,

J. Phys. Soc. Jpn. 77 063708-1-3 (2008).

8. Observation of Fermi-surface-dependent nodeless superconducting gaps in

Ba0.6K0.4Fe2As2,

H. Ding, P. Richard, K. Nakayama, K. Sugawara, T. Arakane, Y. Sekiba, A. Takayama, S.

Souma, T. Sato, T. Takahashi, Z. Wang, X. Dai, Z. Fang, G. F. Chen, J. L. Luo and N. L.

Wang,

Europhys. Lett. 83 47001-1-4 (2008).

9. Fermi arc in the superconducting state of impurity-doped Bi2Sr2CaCu2O8,

T. Sato, K. Terashima, K. Nakayama, S. Souma, T. Takahashi, T. Yamamoto, and K.

Kadowaki,



Phys. Rev. B 78 100502(R)-1-4 (2008).

10. Doping dependence of pseudogap in LaFeAsO1-xFx,

T. Sato, K. Nakayama, Y. Sekiba, T. Arakane, K. Terashima, S. Souma, T. Takahashi, Y.

Kamihara, M. Hirano, and H. Hosono,

J. Phys. Soc. Jpn. 77 Suppl. C, 65-68 (2008).

11. High-resolution angle-resolved photoemission study of bulk electronic states in

YBa2Cu3O7-d,

K. Nakayama, T. Sato, T. Takahashi, T. Nishizaki, Y. Takahashi, and N. Kobayashi,

J. Phys. Chem. Solids 69 2967-2970 (2008).

12. Many-body interactions in hole-doped high-Tc cuprates studied by high-resolution

ARPES,

T. Sato, K. Terashima, K. Nakayama, T. Arakane, H. Matsui, and T. Takahashi,


13. Quasiparticle lifetime in graphite studied by ultrahigh-resolution ARPES,

K. Sugawara, T. Sato, S. Souma, T. Takahashi, and H. Suematsu,


14. Fermi-surface-dependent superconducting gap in C6Ca,

K. Sugawara, T. Sato, and T. Takahashi,

Nature Physics 5 40-43 (2009).

15. Angle-resolved photoemission spectroscopy of the Fe-Based Ba0.6K0.4Fe2As2 high

temperature superconductor: Evidence for an orbital selective electron-mode coupling,

P. Richard, T. Sato, K. Nakayama, S. Souma, T. Takahashi, Y.-M. Xu, G. F. Chen, J. L.

Luo, N. L. Wang, and H. Ding,

Phys. Rev. Lett. 102 047003-1-4 (2008).

16. High-resolution photoemission study of NaV2O4,

T. Qian, K. Nakayama, Y. J. Sun, T. Sato, T. Takahashi, K. Yamaura, and E.

Takayama-Muromachi,



J. Phys. Soc. Jpn. 78 024709-1-4 (2009).

17. Electronic structure of heavily electron-doped BaFe1.7Co0.3As2 studied by angle-resolved

photoemission,

Y. Sekiba, T. Sato, K. Nakayama, K. Terashima, P. Richard, J. H. Bowen, H. Ding, Y-M.

Xu, L. J. Li, G. H. Cao, Z.-A. Xu, and T. Takahashi,

New J. Phys. 11 025020-1-8 (2009).

18. Superconducting-gap symmetry of Ba0.6K0.4Fe2As2 studied by angle-resolved

photoemission spectroscopy,

K. Nakayama, T. Sato, P. Richard, Y.-M. Xu, Y. Sekiba, S. Souma, G. F. Chen, J. L. Luo,

N. L. Wang, H. Ding, and T. Takahashi,

Europhys. Lett. 85 67002-1-5 (2009).


1. “Superconducting gap and pseudogap of La(O1-xFx)FeAs studied by high-resolution

photoemission spectroscopy” (invited),

Takafumi Sato,

International Symposium on Fe-Oxipnictide Superconductors, Tokyo, June 28-29, 2008.

2. “Electronic structure of Ba1-xKxFe2As2 studied by high-resolution ARPES” (invited),

Kosuke Nakayama,

Beijing International Workshop on Iron (Nickel)-Based Superconductors, Beijing, China,

October 17-19, 2008.

3. “High-resolution ARPES of novel superconductors” (invited),

Seigo Souma,

Tohoku-Fudan Joint Workshop, Shanghai, China, November 13-14, 2008.



Name Katsumi Tanigaki


Position Professor

Research Titles 1. Physical properties of nano silicon and nano germanium

compounds,

2. Nano carbon materials,

3. Synthesis and physical properties of new Fe superconductors,

4. Interface control and electronic properties of organic

semiconductors


1. We have performed an extensive soft x-ray photoelectron spectroscopy study on the core

levels of the endohedral atoms of Ba8Ga16Ge30 (BGG), Sr8Ga16Ge30 (SGG), Eu8Ga16Ge30

(EGG), and Sr8Ga16Si30 (SGS) single crystals, using a high-energy facility. Unexpected

features evidencing the different shift for the 2a- and 6d- sites between Ba 4d and Sr 3d

are observed for BGG and SGG. The detailed analyses including theoretical support by

first-principle band structure calculations lead to the surprising conclusion that the

component distributions of the larger tetrakaidecahedral cage are different depending on

the endohedral atoms, which is in contrast to the past consensus that BGG and SGG have

the same framework structure. The differences are further supported by analysis of the Ga

3d core levels. This may suggest thorough reconsiderations on earlier interpretations of

experimental data.

2. Endohedral metallofullerenes are of particular interest from the point of view of its

application as a building block of future nanoscale-electronic devices and conducting

materials, because of a narrow band gap and paramagnetic character. We have successfully

obtained the columnar crystals of endohedral metallofullerene derivative La@C82(Ad)

(Ad: adamantylidene) by slow evaporation of the CS2 solution and clarified its packing

structure. Chemical derivatization may be one of the efficient stepping stones for

accomplishing the orderly alignment of endohedral metallofullerenes followed by

crystallization. We have reported for the first time the preparation and characterization of

the nanorods of the endohedral metallofullerene derivative La@C82(Ad) as a well-arrayed

1D nanostructure, which showed the p-type FET property and oriented with the nanorod

axis perpendicular to the magnetic field.



3. Although lots of researches have greatly contributed to the Fe superconductors, synthesis

and physical properties of the hole doped 1111 phase are still open to be clarified. We have

attempted systematic studies on a series of hole doped 1111 phases in REFeAsO with

RE=La, Pr, Sm with a purpose of clarifying whether hole carriers can indeed be introduced

when RE is partially substituted by alkaline earth metals of Sr and Ba. In both cases of

RE=La and Pr, superconducting samples were clarified to be prepared when the RE site is

replaced by the divalent Sr2+

, and Hall coefficient measurements clearly show that holes

are successfully introduced to the 1111 phase. In the present meeting, we would like to

discuss the present status for having hole-doped systems in oxypnictide superconductors.

4. Carrier mobilities in ambipolar field effect transistors are studied using a rubrene single

crystal assembled with Au/Ca electrodes and SiO2 gate insulators modified by PMMA,

parylene-C and HMDS. The experimental results are interpreted in terms of the two

interfacial efficiency parameters, the injection and the transport efficiencies. The efficiency

of electron carrier injection can accurately be evaluated using Au-Au and Au-Ca electrodes.

The shallow trap density between semiconductor-gate dielectric interface is shown not to

be the most important factor for controlling FET mobilities. Instead, the surface

polarization associated with the surface molecular structure is proposed to be another

possible parameter.


1. “Energetics of endohedral atoms in type-I clathrates observed by soft x-ray

spectroscopy”,

J. Tang, T. Rachi, R. Kumashiro, M. A. Avila, K. Suekuni, T. Takabatake, FZ. Guo, K.

Kobayashi, K. Aoki and K. Tanigaki,

Phys. Rev. B, 78, 085203-085206 (2008).

2. “Nanorods of endohedral metallofullerene derivative”,

T. Tsuchiya, R. Kumashiro, K. Tanigaki, Y. Matsunaga, M. O. Ishitsuka, T. Wakahara, Y.

Maeda, Y. Takano, M. Aoyagi, T. Akasaka, M. T. H. Liu, T. Kato, K. Suenaga, J. S. Jeong,

S. Iijima, F. Kimura, T. Kimura and S. Nagase,

J. Am. Chem. Soc, 130, 450-451, (2008).

3. “FET properties of Chemically modified Carbon nanotubes”,

R. Kumashiro, N. Hiroshiba, N. Komatsu, T. Akasaka, Y. Maeda, S. Suzuki, Y. Achiba, R.



Hatakeyama and K. Tanigaki,

J. Phys. Chem. Solid, 69, 1206-1209 (2008).


1. “Exploring both electron- and hole-doped Fe based oxypnictides”,

Jing Ju, Zhaofei Li, Jun Tang, Kazumi Sato, Masanori Watahiki, Hidenori

Terasaki, Eiji Ohtani, Hirotsugu Takizawa and Katsumi Tanigaki,

International Workshop on Iron-Nickel-Based Superconductors, Oct. 19- 21, Beijing,

China, 2008

2. “Superconductivity in FeSeX (X=0.6~1.0) Series”,

Zhaofei Li, Jing Ju, Jun Tang, Kazumi Sato, Masanori Watahiki, and Katsumi

Tanigaki*,


China, 2008

3. “Physical Properties of SmO1-xFeAs superconductors”,

Masanori Watahiki, Zhaofei Li, Jing Ju, Jun Tang, Kazumi Sato, and Katsumi

Tanigaki,


China, 2008

4. “Magnetic Properties of Series of New Transition Metal Borates with Porous

Framework”,

Jing Ju, Tao Yang, Katsumi Tanigaki、MRS 2008 Meeting, Boston、December 4, 2008,

Boston, U.S.A.

5. “Superconductivity of Silicon and Germanium Network Polyhedra”,

Jun Tang, Katsumi Tanigaki, Jing Ju and Zhaofei Li,

IWADRM2008, National Institute for Materials Science, July 8, 2008.

6. “Structure and Superconductivity of H2 Endohedral C60”,

Katsumi Tanigaki,

IWADRM2008、National Institute for Materials Science, July 8, 2008.



7. “Silicon and Germanium Network Polyhedra viewed from Physical Parameters”,

Katsumi Tanigaki,

ISAQM2008&The 7th APW, November 10, 2008, Yasuda Auditorium, Tokyo

8. ”Silicon and Germanium Network Polyhedra: Relationship between Motions of

Endohedral Atoms and Framework Lattice”,

Katsumi Tanigaki, Jun Tang, Kazumi Sato, Masatoshi Watahiki and Alfonso San Miguel,

MRS 2008 Meeting, Boston, Boston, U.S.A ,December 4 (2008).

9. ”Superconductivity and Magnetism appearing in Nano materials”,

Katsumi Tanigaki,

GCOE International Symposium: Perspective in Inorganic Hybrid Materials, Tohoku

University, Sendai, August 1, (2008).

10. “Physical Properties in Nano-Assembled Materials: Endohedral Atoms and Molecules in

Confined Nanospaces”,

K. Tanigaki,

The Second International Symposium on Interdisciplinary Materials Science:

ISIMS-2009, Tsukuba International Congress Center, March 9, 2009.

11. “Physical Properties of Physically and Chemically Doped Nano-Carbon Materials”,

R. Kumashiro, Yan Wang, T. Akasaka, T. Tsuchiya, Y. Maeda and K. Tanigaki,

The IUMRS International Conference in Asia 2008, Nagoya, Japan, December, (2008).

12. “New Materials with Regulated Nanospace”,

Katsumi Tanigaki,

Workshop in Materials Science: Frontiers opened by Spions, Takeda Hall, Tokyo,

November 29, (2008).

13. “Nanocarbon, Nanoboron, Nanosilicon and Nanogermanium and their Applications”,

Katsumi Tanigaki, Workshop on Nanoperticles, IMR, Tohoku, Japan, Decedmber 17,

(2008).

14. “New Functions of Nano Clusters”,

Special Symposium on Future Materials, Chemical Society of Japan, Nippon



University, Tokyo, March 27, (2009).

15. “Defects and Electronic Properties in IVth-group Nano Materials”,

K. Tanigaki, J.Tang, Z. Li, and J. Ju,

IMR Workshop, Sendai, Japan, January 19, (2009).



Name Hideo Kozono

Department Mathematics

Position Professor

Research Title Study of Nonlinear Partial Differential Equations


1. Remarks on the Gagliardo-Nireberg inequality in the critical Sobolev space and

BMO.

In the n-Euclidian space R^n, we deal with the Sobolev space H^{s, r} and consider the

critical case when s= n/r. It is known that the critical space H^{n/r, r} is continuously

imbedded into L^r for all q with r ≦ q < ∞ but not into L^∞. We investigate the

Gagliardo-Nireberg interpolation inequality and obtained the optimal growth rate of the

constant as q tends to ∞. Furthermore, as a natural extension of the case r tends to ∞, we

establish an interpolation inequality in terms of BMO. Our estimates are applicable to the

John-Nireberg inequality and the Brezis-Gallouet-Wainger inequality.

2. Global solution to the parabolic-parabolic Keller-Segel system with the initial data in

the weak L^p space and BMO and its application to the self-similar solutions

We shall show the existence of global strong solutions to the semilinear Keller-Segel

system In R^n, n ≧ 3 of parabolic-parabolic type with small initial data in the weak L^{n/2}

and BMO. Our method is based on the perturbation of linealization together with the

L^p-L^q-estimates of the heat semigroup and the fractional powers of the Laplace operator.

As a by-product of our method, we shall construct the self-similar solution and prove the

smoothing effect. Furthermore, stability problem on our strong solutions will be also

discussed.

3.Local existence ad blowing-up of solutions to the 2D Keller-Segel system.

We consider the 2-D Keller-Segel system and construct a mild solution for every initial

data in L^1. The local existence time is explicitly characterized in terms of the initial data L^1

∩L^q with1< q <2. We also prove the finite time blow-up of strong solution under the

assumption that the initial mass is greater than 8π. As an application of our mild solutions, an

exact blow-up rate near the maximal existence time is obtained.


1. Remarks on Gagliardo-Nirenberg type inequality with critical Sobolev space and BMO.



Math. Z. 259 (2008), 935--950 (with H.Wadade).

2. Local existence and finite time blow-up in the 2-D Keller-Segel system.

J. Evol. Equ. 8 (2008), 353--378 (with Y.Sugiyama).

3. Keller-Segel system of parabolic-parabolic type with initial data in weak L^{n/2}(R^n)

and its application to the self-similar solution. Indiana Univ. Math. J. 57 (2008),

1467—1500 (with Y.Sugiyama).


1. “Global Div-Curl Lemma on bounded domains in R^3”,

H. Kozono,

International Conference on “Vorticity, Rotation and Symmetry-Stabilizing and

Destabilizing Fluid Motion” (May 18-23, C.I.R.M. Luminy, France)

2. “Regularity criterion on the Hoelder continuity of the kinematic energy of the turbulent

solution to the Navier-Stokes equations.”,

H.Kozono,

International Conference on “New Aspects and Development of Mathematical Analysis

in Nonlinear Phenomina”(May 29-31, Kyushu Univ., Japan)

3. “Leray's Problem on the Navier-Stokes equations”,

H. Kozono,

Colloquium Math. Institute TU Darmstadt (June 6, Darmstadt, Germany)

4. “Global Div-Curl Lemma in 3D bounded domains.”,

H.Kozono,

Colloquium Math. Institute Albert-Ludwigs University of Freiburg (June 20,

Freiburg, Germany)

5. “L^r-Helmholtz decomposition and its application to the Navier-Stokes equations”,

H.Kozono,

Series of Lectures at TU Darmstadt (June 23,25,26,30, Darmstadt, Germany)

6. “Leray's problem for the stationary Navier-Stokes equations”,



H.Kozono,

Advanced analysis seminar of University of Heidelberg (July 1, Heidelberg, Germany)

7. “Global Div-Curl Lemma in 3D bounded domains”,

H.Kozono,

RIMS conference on “Harmonic Analysis and nonlinear PDE ” (July 7-9, Kyoto, Japan)

8. “L^r-Helmholtz decomposition and its application to the Navier-Stokes equations”,

H.Kozono,

Series of Lectures at Ajou University (Oct. 10-11, Suwon, Korea)

9. “Well-posedness of the Navier-Stokes equations”,

H.Kozono,

Colloquium Math. Institute University of Sydney（Dec.3, Sydney, Australia）


H.Kozono,

Workshop on “Nonlinear Partial Differential Equations and Fluid Mechanics” (Dec.8-10,

Suwon, Korea )


H.Kozono,

Third Workshop on “Nonlinear Partial Differential Equations: Analysis, Computations

and Applications” Northwest University (Dec.27-30, Xian, China)

12. “Stationary Navier-Stokes equations—solvability and topological type of the domain”,

H.Kozono,

49th Encounter with Mathematics on “Mathematical aspect of the fluid mechanics, Chuo

Univ. (09 Feb. 27-28, Tokyo Japan)



Name Motoko Kotani


Position Professor

Research Title Discrete Geometric Analysis, Differential Geometry


1. We organized the international conference “MSJ-SI, Probabilistic Approach to Geometry”

(July 28 – August 8, 2008), which aimed interaction between Geometry and Probability

Theory. Rough Path, Random Group, Heat Kernel, Mass Transport were set as the main

subjects of the conference. Thirty three invited speakers (thirteen from abroad), and more

than hundred people participated.

2. We started a new project “A Mathematical Challenge to a New Phase of Material

Sciences”, to meet the increasing demands for a new mathematical theory to describe

nano-scale phenomena. This year we had one kick-off symposium (2008.12.26.) and

MathMate-workshop (2009.2.21-22 ) to seek for seeds of collaborations between

Mathematics and Material Sciences.

3. The K4 crystal structure is proposed, as a “diamond twin” from Mathematical view point.

The first principles calculations showed the K4 carbon crystal has a meta-stable structure

with metallic property, and suggested possibility of pressure induced structural phase

transition from graphite. This result was published from PRB.

4. Seminars and Schools we organized:

- Sergio Albeverio (U. Bonn), “Asymptotics of infinite dimensional integrals and

applications”, 2009.9.19

- Uzy Smilansky (Weizmann Institute), “Nodal Domains from Chladni to Quantum Chaos”,

2008.10.14-16

- “Schools on Hydrodynamics Limit”, 2008.11.21-24

- Shinich Kotani (Osaka University), “Random Schrödinger Operator”,2008.12.25

- Vaughan F.R.Jones (U.C. Berkeley), ”Planar Algebra” 2009.2.2, “Flatland, a great place to

do algebra” 2009.2.3

- Spring School “Einstein Equation” 2009.2-22-2.24

- Michel Deza（Ecole Normale Superieure）, “Geometry of the Structure of Viruses”

2009.3.10, “Space Fullerenes” 2009. 3.13




1. “New Matallic Carbon Crystal”,

M.Itoh, M.Kotani, H.Naito, T.Sunada, Y.Kawazoe and T.Adschiri,

Phys. Rev. Lett. 102 (2009), 055703.

2. “Geometry and Symmetry, “A Diamond Twin?””,

Sugaku Seminar 7(2008) 23-28 (in Japanese).


1. “Geometric aspect of random walk on a crystal lattice”,

Perspectives in mathematical sciences, University of Tokyo, 2008.10.7-9.

2. “Geometric aspect of random walk on a crystal lattice”,

Algebras, Operators and Noncommutative Geometry, Australian National University,

Australia, 2008.12.1-5.

3. “A mathematical challenge to material sciences”, Colloquim Talk,

Technische Universität Graz, Austria, 2009.3.23.

4. “Spectral Analysis of Crystal Lattices”, Intensive Lectures,

Technische Universität Graz, Austria, 2009.3



Name Reiko Miyaoka


Position Professor

Research Title Study of hypersurface theory and special geometry.


1. We investigate the G2 orbits, the orbits of the exceptional Lie group G2, acting by adjoint

on its Lie algebra. The G2 orbits have symplectic, and Kaehler structures, and these are

unique known example of isoparametric hypersufaces in S^{13} with six principal

curvatures with multiplicity two. A principal orbit M=G2/T^2 has a Kaehler fibration over

S^6 with fibers SU(3)/T^2. A singular orbit M+ =G2/U(2)= M- are diffeomorphic to the

complex quadratique Q^5, and have Kaehler fibrations over S^6 and G2/S0(4), respectively.

These are known as the twistor spaces of the base manifolds by Bryant. Moreover, the

SO(4) suborbits are Lagrangian submanifolds of M, which exist in two parameters. They

degenerate into singular orbits N+and N-, where they are still Lagrangian in M+ and M-,

respectively. Through these research, we can clarify the structure of the group G2.

2. We gave a new proof for the homogeneity of isoparametric hypersurfaces with six

single principal curvatures in a manner which can be extended to the multiplicity two

case.


1. “Gauss map of pseudo-algebraic minimal surfaces”,

R. Miyaoka, R. Kobayashi and Y. Kawakami,

Forum Mathematucum，20 (2008), 1055--1069.

2. “Isoparametric Geometry and Related Fields”,

R. Miyaoka,

Adv. Studies in Pure Math. 51, (2008), 305-326.

3. “The Dorfmeister-Neher theorem on isoparametric hypersurfaces”,

R. Miyaoka,

to appear in Osaka J. Math. (2009).

4. “Classification of isoparametric hypersurfaces”,



R. Miyaoka,

Geometry and Something, (Proceedings, Fukuoka University), (2009) 16--45.


1. “Geometry of G_2 orbits”,

R. Miyaoka,

“International Conference on Differential Geometry”, University of Science and

Technology in China, (2008.5.24, Hefei, China)

2. “Geometric structure of G_2 orbits”,

R. Miyaoka,

Hayama Symposium on Complex Analysis in Several Variables (2008.7.12-16,

Shonan-Kokusai-mura, Hayama)


R. Miyaoka,

Seminar of Interactive Research Center of Science (2008.8.4, Tokyo Inst. Tech.)


R. Miyaoka,

Colloquium Talk at Ehime University (2008.9.11)

5. “Geometry of fronts”,

R. Miyaoka,

Colloquium Talk at Osaka University (2008.11.10)

6. “Geometry of wave front —Recent results in hypersurface geometry—”,

R. Miyaoka,

The 4th Geometry Conference for Friendship between China and Japan (2008.12.23—27,

Chern Institute, Nankai Univ., China)

7. “Harmonic maps and the beauty of diamond”,

R. Miyaoka,

Advanced Researchers Seminar for Women, (2009.1.24, Nara Women Univ.)



8. “Harmonic maps and the beauty of diamond”,

R. Miyaoka,

Seminar in OIST (2009.1.29, Okinawa Institute of Science and Technology)



Name Eiji Yanagida


Position Professor

Research Title Study of nonlinear elliptic and parabolic equations


1. I have investigated the dynamics of nonlinear diffusive systems from a mathematical

viewpoint. More specifically, with Marek fila, I studied the behavior of solutions for a

supercritical parabolic partial differential equations. With Shota Sato, I studied the

existence of solutions with moving singularities, and established the time-local existence,

uniqueness and comparison principle.

2. With Yuan Lou and Chiu-Yen Kao, I studied the minimization of the principal eigenvalue

for an elliptic boundary value problem with indefinite weight. We gave a partial answer

to this problem in the case of one-dimensional domain with spatial inhomogeneity.

3. With Linghai Zhang, I studied the traveling wave solutions for some integro-differential

equations related to the neurosience. We obtained an optimal estimate of the wave speed

that is invariant the scaling invariance.


1. Linear behaviour of solutions of a superlinear heat equation,

M. Fila, J. R. King, M. Winkler and E. Yanagida,

J. Math. Anal. Appl. 340 April (2008), 401—409.

2. Principal eigenvalue for an elliptic problem with indefinite weight on cylindrical

domains,

C.-Y. Kao, Y. Lou and E. Yanagida,

Mathematical Biosciences and Engineering 5 (2008), 315—335.

3. Convergence to selfsimilar solutions in a supercritical parabolic equation,

M. Fila, M. Winkler and E. Yanagida,

Disc. Cont. Dyn. Systems 21 (2008), 703--716.

4. Sharp estimate of the convergence rate for a semilinear parabolic equation with



supercritical nonlinearity,

M. Hoshino and E. Yanagida,

Nonlinear Analysis TMA 69 (2008), 3136--3152.

5. Convergence of solutions of a semilinear parabolic equation to selfsimilar solutions of the

linear heat equation,

M. Fila, M. Winkler and E. Yanagida,

Adv. Diff. Eqs. 13 (2008), 1131-1149.


1. “Solutions with moving singularities for a semilinear parabolic equation”,

E. Yanagida,

7th AIMS international conference on Dynamical System, University of Texas at

Arlington, USA. May 18-21.

2. “Solutions with moving singularities for a semilinear heat equation”,

E. Yanagida,

The 9th International Workshop on Differential Equations, Chonnam University, Korea,

May 29-31.

3. “Convergence of anisotropically decaying solutions of a semilinear parabolic equation”,

E. Yanagida,

7th Australia New Zealand Mathematics Convention, University of Canterbury,

Christchurch, New Zealand, December 9



Name Takashi Shioya


Position Professor

Research Title Geometric analysis of metric spaces


As a continuation of our study of geometric analysis on Alexandrov spaces, we prove a

splitting theorem of Cheeger-Gromall type. Since the Ricci curvature tensor on Alexandrov

spaces cannot be defined, we settle the infinitesimal version of the Bishop-Gromov volume

comparison condition intead of the nonnegativity of Ricci curvature. The key idea is to obtain

a Laplacian comparison result, the proof of which is much different from the Riemannian case.


1. “Variational convergence over metric spaces”,

K. Kuwae and T. Shioya,

Trans. Amer. Math. Soc., 360, 35-75, (2008)

2. “Geometric analysis on Alexandrov space”,

T. Shioya,

Sugaku, 61-1, 1-20, (2009)


1. “Geometric Analysis on Alexandrov spaces”,

T. Shioya,

International Conference on “Global Analysis and Differential Geometry” (Mar. 20, Saga)

2. “A splitting theorem for weighted Alexandrov spaces”,

T. Shioya,

Riemannian geometry and geometric analysis (Feb. 21, Tsukuba)

3. “Collapsing three-manifolds with a lower curvature bound”,

T. Shioya,

The 4th Geometry Conference for the Friendship of China and Japan (Dec. 26, Tenjin,

China)




T. Shioya, Probabilstic approach to geometry (Jul. 31, Kyoto)


T. Shioya,

New approaches to curvature (Aug. 25-28, Le Diabralet, Siwtzland)



Name Toshifumi Futamase

Department Astronomy

Position Professor

Research Title Study of weak gravitational lensing for the application to the

observational cosmology


1. We have developed a new approach to measure weak lensing signal using higher-order

moments of background galaxies. This approach has been applied to the Subaru data of a

compact cluster A 1689 and obtained a sub clump in the central part of cluster which have

not detected by the usual weak lensing analysis.

2. We have developed a new approximation scheme to derive the equation of motion for a

fast moving particle in the framework of general relativity. The method uses the null

coordinate and applied to the equation of motion of a small black hole in an arbitrary

background spacetime.


1. “Equation of motion in general relativity of a small charged black hole”,

T. Futamase, P. A. Hogan, and Y. Itoh,

Physical Review, D, 78, 104014-1 - 1014014-20, (2008)

2. “WA Method for Weak Lensing Flexion Analysis by the HOLICs Moment Approach”,

Y. Okura, K. Umetsu and T. Futamase,

The Astrophysical Journal, 680, 1-16 (2008)

3. “Validity of strong lensing statistics for constraints on the galaxy evolution model”,

A. Matsumoto and T. Futamase,

Monthly Notices of Royal astronomical Society, 384, 843-848, (2008)


1. “3rd Post-Newtonian approximation in the strong point particle limit”,

T. Futamase,

“Post Newton 2008, International Workshop” Jun.11-14 2008, Jena, Germany)



2. “Recent progresses in weak lensing Study”,

T. Futamase,

KEK cosmology workshop DE2008 (December 8-12, Tsukuba)

3. “HOLICs approach to weak lensing and its applications”,

T. Futamase,

Seminar, December 5th 2008, Observatoire Astronomique de Marseille, Provance, France

4. “HOLICs +other topics”,

T. Futamase,

Seminar, Institute of Astronomy, Paris, October 30, Paris, France

5. “Weak Lensing Analysis and its applications”,

T. Futamase,

Seminar, Fundamental Physics, University of Barcelona, March 20th 2009, Barcelona,

Spain

6. “Observational Cosmology using gravitational lensing”,

T. Futamase,

January, 30th, 2009, Chuo University, Tokyo, Japan



Name Takashi Ichikawa


Position Professor

Research Title Study of galaxy evolution at high redshift universe and new

instruments for infrared astronomy in Antarctica


1. We presented the results of deep near-infrared imaging observations of the z=3.1

proto-cluster region in the SSA22a field taken by MOIRCS mounted on the Subaru

Telescope. We examined the distribution of the K-selected galaxies by using a simple color

cut for distant red galaxies (DRGs) as well as a photometric-redshift selection technique.

We investigated the colors and mass-to-light ratios of bulges and disks for 28 nearby spiral

galaxies with various morphological types of Sab–Scd, using images in optical and

near-infrared bands as well as published rotation curves.

2. We developed a 40 cm infra-red telescope, which is dedicated for the use even in winter at

Dome Fuji. In designing the telescope, we took account of the difference of the thermal

expansion rate among materials, which were used for the telescope. Most parts of the

telescope are made of aluminum to make the telescope as light as possible, so that it makes

the transportation from seacoast to inland and assembling at Dome Fuji easier. We

presented the details the design for Antarctic Infra-Red Camera, for use with 40 cm

Antarctic telescope. The camera will also be compatible with the planned 2 meter class

Japanese telescope at Dome F. We discussed the scientific potential for a small Antarctic

telescope.

3. We presented the development and first astronomical applications of VPH grisms which

are now operated at cryogenic temperature in MOIRCS. We designed and fabricated the

VPH grisms with a resolving power R=3000 for the use in near-infrared bands. Based on

commissioning observations with MOIRCS, we have confirmed the high efficiency (~0.8)

and the resolving power of the original design.


1. “Multi-Object Infrared Camera and Spectrograph for the Subaru Telescope. I. Imaging”,

Suzuki, R., Tokoku, C., Ichikawa, T. et al.,

Pub. Astron. Society, Japan, 60,1347 (2008)



2. “Subaru/MOIRCS Near-Infrared Imaging in the Proto-Cluster Region at z=3.1”,

Uchimoto, K. Y., Ichikawa, T., et al.,

Pub. Astron. Society, Japan, 60, 683, (2008)

3. “Colors and Mass-to-Light Ratios of Bulges and Disks of Nearby Spiral Galaxies”,

Yoshino, A. and Ichikawa, T.,

Pub. Astron. Society, Japan, 60, 493, (2008)


1. “Clustering Properties of Low Stellar-Mass Galaxies in GOODS-North Region”,

Ichikawa, T. et al.,

in Panoramic Views of Galaxy Formation and Evolution ASP Conference Series, Vol. 399,

123, (2008) (Hayama, Japan)

2. “Cryogenic VPH grisms for MOIRCS. ”,

Ichikawa, T. et al.,

in SPIE, 7014, 60 (2008) (Marseille, France)

3. “2-m class telescope at dome Fuji”,

Takato, N., Ichikawa, T., et al.,

in Proc. 2nd ARENA Conference on The Astrophysical Science Cases at Dome C,

(Potsdam, Germany)

4. “Inter-Division IX-X Working Group Encouraging the International Development of

Antarctic Astronomy”,

Burton, M., Ichikawa, T. et al.,

2008, in Transactions IAU, Volume 4, Issue 27A, Reports on Astronomy 2006-2009

(Prague, Czech)

5. “Distant Red Galaxies in the MOIRCS Deep Survey”,

Kajisawa, M., Konishi, M., Ichikawa, T., et al.,

in Panoramic Views of Galaxy Formation and Evolution ASP Conference Series, Vol. 399,

296 (2008) (Hayama, Japan)

6. “A 40cm Infra-Red Telescope in Antarctica”,



Murata, C., Ichikawa, T., et al.,

in SPIE, 7019, 79, (2008) (Marseille, France)

7. “AIR-C: Antarctic infra-red camera”,

Lundock, R. and Ichikawa, T.,

in SPIE, 7014, 89 (2008) (Marseille, France)



Name Toru Yamada


Position Professor

Research Title Study of Galaxy formation and Evolution


1. We investigated the distribution and properties of star-forming galaxies at high redshift. We

conducted a very deep emission-line search at a high-density region of star-forming

galaxies at z=3 and found that the abundance of extremely young (age less than a few Myr)

or metal poor low-mass galaxies are significantly large in such region. At the same time,

the very strong clustering of Lyman Alpha Blobs, namely the extended gigantic Lyα clouds

in such region is also discovered. They are found to be fairly massive objects, which often

host active nuclei, probably in the phase of dominant star-formation and assembly. Thus,

by studying such high-density region at high-redshift universe, we are witnessing the

various different phase of the formation of various kinds (mass-scale) of galaxies

2. We also studied the properties of Active Galactic Nuclei among the galaxies at high

redshift. We found that the AGN activities are detected only among stellar-massive

galaxies and the fraction of galaxies with AGN is very high, more than 30% among the

massive galaxies. The active duration in the AGN duty cycle of the high-redshift massive

galaxies seems large.


1. “Improved Measurement of the Rossiter-McLaughlin Effect in the Exoplanetary

System HD 17156”,

Narita, N., et al.,

2009 Publication of Astronomical Society of Japan, in press.

2. “MOIRCS Deep Survey III: Active Galactic Nuclei in Massive Galaxies at z=2-4”,

Yamada,

T., et al. 2009, Astrophysical Journal, in press

3. “Discovery of a Giant Ly-α Emitter Near the Reionization Epoch”,

Ouchi, M., et al.,



2009, Astrophysical Journal, 696, 1164

4. “Spitzer Observations of Extended Lyman-α Clouds in the SSA22 Field”,

Webb, T.M.A., Yamada, T., Huang, J.-S., Ashby, M.L.N., Matsuda, Y., Egami, E.,

Gonzalez, M., Hayashimo, T.


5. “Detections of Lyman Continuum from Star-Forming Galaxies at z ~3 through

Subaru/Suprime-Cam Narrow-Band Imaging”,

Iwata, I., et al.,


6. “The Chandra Deep Protocluster Survey: Evidence for an Enhancement of AGN Activity

in the SSA22 Protocluster at z = 3.09”,

Lehmer, B.D., et al.,


7. “Multi-Object Infrared Camera and Spectrograph (MOIRCS) for the Subaru

Telescope I. Imaging”,

Suzuki, R., et al.,

2008, Publication of Astronomical Society of Japan, 60, 1347


1. “High-redshift protocluster as the site of galaxy formation”,

T. Yamada,

International Conference on “When the Universe formed Stars” (Nov.17-21 La

Martinique Island, France)

2. “AGN Activities Among the Star-forming Galaxies at High Redshift”,

T. Yamada,

International Conference on “The Starburst AGN Connection Conference” (Oct.27-31

Shanghai, China)

3. “High-redshift protocluster as the site of galaxy formation”,

T. Yamada,



International Conference on “Understanding Lyman Alpha Emitters” (Oct 6-10,

Heiderberg, Germany)



Name Keiichi Noe

Department Philosophy

Position Professor

Research Title Study of the philosophy of science, especially philosophical

integration of scientific knowledge into human culture from a

narratological point of view.


1. Analyzing the concept of “causality,” I elucidate that both scientific causality and historical

causality stem from common ground of narrative causality. Further research on the

narrative causality would clarify interrelation between scientific explanation and

humanistic understanding.

2. The representative philosopher in modern Japan, Kitaro Nishida devoted himself to

studying the philosophy of science in his last ten years. Examining his philosophical texts,

I point out his unique position as well as contemporary significance in the philosophy of

mathematics, physics and biology.


1. “What is Constructivism?: From a Viewpoint of Philosophy of Science”,

K. Noe,

BUTSURI, 63, 381-384, (2008)

2. “The Identity Crisis of Philosophy”,

K. Noe

ARCHE, 16, 1-11, (2008)

3. “Narratology of Science: On ‘Narrative Causality’”,

K. Noe,

Iwanami-Kouza TETSUGAKU, 1, 51-72, (2008)


1. “The Recent Movement of Philosophy in Japan”,

K. Noe,

The XXII World Congress of Philosophy (Jul.30-Aug.5, Seoul, Korea)



2. “Kitaro Nishida as Philosopher of Science”,

K. Noe,

Envisioning Japanese and Chinese Philosophical Potentials in 21st Century (Dec.13-15,

Hong Kong)

3. “Historical Body : Combining Reason and Sensibility”,

K. Noe,

ASAHIKAWA Polyphony on the Earth 2008, (Oct. 17-18, Asahikawa)

4. Research Reports in 2008 Fiscal Year

Documents

Transcript of 4. Research Reports in 2008 Fiscal Year