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
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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
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发表时间:
1990
影响因子:
1.7
通讯作者:
Y. Ono
中科院分区:
文献类型:
--
作者:
T. Ohtsuki;Y. Ono
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...