Application of nanoHUB Tools in the Classroom
Dragica VasileskaArizona State University
172 countries172 countries
Users in Sept 2010
Gerhard Klimeck
Outline
Overview of Tool Usage
Selected Tools Within ABACUS
Selected Tools Within AQME
Gerhard Klimeck
Network for Computational Nanotechnology (NCN)Purdue, Norfolk State, Northwestern, MIT, Molecular Foundry, UC Berkeley, Univ. of Illinois, UTEP
How to Use Tools?
Crystal Viewer
PN Junction
LabPCPBT
Gerhard Klimeck
Courses at ASU That Utilize nanoHUB.org
EEE352: Properties of
Electronic Materials
(D.K. Ferry) ABACUS
EEE434: Quantum
Mechanics for Engineers
(D. K. Ferry) AQME
EEE533: Semiconductor
Device and Process Modeling
(D. Vasileska) ABACUS
EEE598: Advanced Device
Simulation (D. Vasileska)
AQME + ABACUS
EEE598: Modeling
Optoelectronic Devices
(D. Vasileska)
Gerhard Klimeck
Network for Computational Nanotechnology (NCN)Purdue, Norfolk State, Northwestern, MIT, Molecular Foundry, UC Berkeley, Univ. of Illinois, UTEP
Selected Tools Within ABACUS
Used in EducationPN
Junction ModuleMOS
Capacitors Module
Gerhard Klimeck
Developed at Bell Laboratories
Allows Simulation of Silicon-Based
Devices
Input Deck Easy to Implement
Engine Behind The Tools Chosen from ABACUS
PADRE
PADRE (Pisces And Device REplacement) developed by Mark Pinto at AT&T Bell Labs.
Gerhard Klimeck
ABACUS: PN Junction Lab
PN Diode Tool
Equilibrium Conditions
Electric Field Profile
Total Charge Density
Non-Equilibrium Conditions
IV-Characteristics
4585 user(s), detailed usage1374 user(s) in 83 class(es)2 Citation(s)
Gerhard Klimeck
PN Junction Lab: Electric Field Profile
Gerhard Klimeck
PN Junction Lab: Total Charge Density
Gerhard Klimeck
PN Junction Lab: IV Characteristics
Gerhard Klimeck
ABACUS: MOS Capacitors Tool
MOS Capacitors Tool:
•Inversion Charge Density•Low-Frequency and High Frequency CV Curves
2341 user(s), detailed usage583 user(s) in 33 class(es)2 Citation(s)
Gerhard Klimeck
MOSCap: Electron Density
Tox = 1 nmNA = 1017 cm-3
VG = 1 V
Tox = 1 nmNA = 1017 cm-3
VG = 0 V
Gerhard Klimeck
MOSCap: Capacitance
Gerhard Klimeck
Network for Computational Nanotechnology (NCN)Purdue, Norfolk State, Northwestern, MIT, Molecular Foundry, UC Berkeley, Univ. of Illinois, UTEP
Selected Tools Within AQME Used
in EducationBSC Lab
PCPBT
SCHRED
Gerhard Klimeck
AQME: BSC Lab
Type of Confinement Most Commonly Encountered in Practical Applications
The Form of the Wavefunctions
When Quantum Mechanics Approaches Classical Mechanics?
329 user(s), detailed usage32 user(s) in 4 class(es)
Gerhard Klimeck
BSC Lab: Confinement
Type of Confinement Most Commonly Encountered in Practical Applications
Gerhard Klimeck
BSC Lab: WavefunctionsThe Form of the Wavefunctions
Gerhard Klimeck
BSC Lab: Quantum and Classical Physics
When Quantum Mechanics Approaches Classical Mechanics?
Quantum Behavior Towards Classical Physics
Gerhard Klimeck
AQME + ABACUS: PCPBT
Symmetric vs. Asymmetric Double Barrier Structure
PCPBT
514 user(s), detailed usage30 user(s) in 6 class(es)
Gerhard Klimeck
PCPBT: Symmetric vs. Asymmetric Structure
Symmetric barriers Asymmetric barriers
Gerhard Klimeck
PCPBT: From 1 Well to 2 wells to 5 wells to Periodic Potentials
Gerhard Klimeck
AQME: Schred
When Quantum Effects Become
Important?Classical vs.
Quantum Mechanical
Charge Density
Degradation of the Total Gate Capacitance
Shift in the Threshold Voltage
Modeling of Strained Si Capacitors
Modeling of GaAs
Capacitors
1934 user(s), detailed usage263 user(s) in 31 class(es)104 Citation(s)
Gerhard Klimeck
Schred: When quantum effects become important?
NA=1016, 1017 and 1018 cm-3
Tox=1 nm
Degradation of totalgate capacitance
Shift in the thresholdvoltage
Schred as Teaching Tool
Gerhard Klimeck
Schred: Classical vs. quantum-mechanicalcharge density
NA = 1018 cm-3, Tox = 1 nm
Schred as Teaching Tool
Gerhard Klimeck
Schred: Degradation of the total gate capacitance
0.20.30.4
0.50.6
0.7
0.80.9
1
1 2 3 4 5 6 7 8 9 10
classical M-B, metal gatesclassical F-D, metal gatesquantum, metal gates
quantum, poly-gates ND=6x1019 cm-3
quantum, poly-gates ND=1020 cm-3
quantum, poly-gates ND=2x1020 cm-3
Cto
t/Cox
Oxide thickness tox
[nm]
T=300 K, NA=1018 cm-3
Schred as Research Tool
Gerhard Klimeck
Schred: Shift in the threshold voltage
0
100
200
300
400
500
1016 1017 1018
Van Dort experimental data for tox
=14 nm
Our simulation results for tox
=14 nm
Vth
[m
V]
NA [cm-3]
Schred as Research Tool
Gerhard Klimeck
Schred: Modeling of Strained Si Capacitors
Schred as Research Tool
Gerhard Klimeck
Schred: Modeling of GaAs Capacitors
Schred as Research Tool
Gerhard Klimeck
Conclusions
Tools on the nanoHUB are
useful for:
Teaching in the classroom for real-time
demonstrations
Homework assignments to
better understand
device physics concepts
Research
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