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Page 10: x’ y x LOjà [aαa η η L L (0,0) (0,0) (na,nb) (na,nb) T T (ma,mb) (ma,mb) x x y y x’ x’ y’ y’ a a b b B B A A A A τ1 τ1 τ2 τ2 3 τ3 OLÄ [OjÅ [ ÷ zÆ Ojà [÷ ø%ù^ú

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10-3

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10-2

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100

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u/2γL

u/2γL

Reflection and Transmission Coefficients

Ref

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10-1

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100

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Potential Maximum (units of γ0)

Potential Maximum (units of γ0)

|tKK|

|tKK|

|rKK’||rK’K|

|tK’K’|

|tK’K’|

Tight Binding Effective-Mass

Tight Binding Effective-Mass

L/ 3a=50

rKK=rK’K’=0tK’K=tKK’=0

rKK=rK’K’=0tK’K=tKK’=0

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0.0

0.0

0.2

0.2

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0.0

0.0

0.5

0.5

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2.0

L7/L5

L7/L5

Conductance (units of e2/πh)

Con

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(un

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πh)

8(L7/L5)3

8(L7/L5)3

Two-Mode Approx.

Two-Mode Approx.

8L53L7

3/(L53+L7

3)2

8L53L7

3/(L53+L7

3)2

ε=0L5/2πl=0

ε=0L5/2πl=0

Armchair CN(2<L7/ 3a<L5/ 3a<98) Zigzag CN(3<L7/a<L5/a<129)

»»DE¼ ßvà#á�â'Ò0ã#ä t0å ¼ �8Õ7�+��½%Õ ì0¾|[�]n¿5q+À [ [taÁ¿ 9 À ßvà#á�â#Ò0ã ¼ N3P ¼Mk ��Z � ­ ¾

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