Hall Current Distributions in Quantum Hall Effect on Finite Cylinder Surface. II. Gate Barrier Effect

Hall Current Distributions in Quantum Hall Effect on Finite Cylinder Surface. II. Gate Barrier Effect
复制标题

有限圆柱表面量子霍尔效应中的霍尔电流分布。

DOI:
10.1143/jpsj.59.637
复制
发表时间:
1990
影响因子:
1.7
通讯作者:
Y. Ono
Y. Ono
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
T. Ohtsuki;Y. Ono

文献摘要

被引文献

相似文献

利用有限圆柱模型,研究了系统中间存在栅极势垒的量子霍尔体系中的平衡和非平衡电流分布。n的边缘状态的能量朗道次能带,ΔEν≡Eν(θ)- (n + 1/2) \百巴ω_c, e_ν(θ)b E i n g t h E E i g E n E n E r g y o f t h E E d g E s t t E s u n d E r t h E g E n E r我z l E d p E r i o d c b o u n d r y c o n d i f t i o n o r t h f E w v E u n c t i o nΨ(x, y + L_y) = E ^ -θΨ(x, y),我n t r s o d u c E d t o c h r c t E r i z E t h E b E h v i o r o f E d g E s t t E s。W h e nΔE_νs m u c h s m a l l e r t h n t h e g t e b r r i e r p o t e n t i l U_g t h e e d g e s t t e s r e c o m p y l e t e l r e f l e c t e d W h i l e t h e y r e t r n s p r e n t W h e nΔE_νis l r g e r t h n U_g。我们在哪里? ΔE_ν\lesssimU_g,我们在哪里?我们在哪里?我们在哪里?我们在哪里?我们在哪里?我们在哪里?我们在哪里?我们在哪里?
The equilibrium and non-equilibrium current distributions are investigated in the quantum Hall regime by using the finite cylinder model with a gate barrier potential at the middle of the system. The energy for the edge states of the n th Landau subband, Δ E ν ≡e ν (θ)-( n +1/2)\hbarω_c, e_ν(θ) b e i n g t h e e i g e n e n e r g y o f t h e e d g e s t a t e s u n d e r t h e g e n e r a l i z e d p e r i o d i c b o u n d a r y c o n d i t i o n f o r t h e w a v e f u n c t i o n Ψ(x, y+L_y)=e^-iθΨ(x, y), i s i n t r o d u c e d t o c h a r a c t e r i z e t h e b e h a v i o r o f e d g e s t a t e s . W h e n ΔE_ν i s m u c h s m a l l e r t h a n t h e g a t e b a r r i e r p o t e n t i a l U_g, t h e e d g e s t a t e s a r e c o m p l e t e l y r e f l e c t e d , w h i l e t h e y a r e t r a n s p a r e n t w h e n ΔE_ν i s l a r g e r t h a n U_g. W h e n ΔE_ν\lesssimU_g, w e h a v e s t a t e s w h i c h h a v e s i g n i f i c a n t a m p l i t u d e b o t h i n t h e b u l k r e g i o n o f...