ANOMALOUS RXX IN THE QUANTUM HALL REGIME DUE TO IMPURITY-BOUND STATES

被引：11

作者：

LEE, Y ^{[1
]}

MCLENNAN, MJ ^{[1
]}

DATTA, S ^{[1
]}

机构：

[1] PURDUE UNIV,SCH ELECT ENGN,W LAFAYETTE,IN 47907

来源：

PHYSICAL REVIEW B | 1991年 / 43卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.43.14333

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a direct numerical calculation of R(xx) and R(xy) in a rectangular Hall bar with a single impurity from the low-field to the quantum Hall regime. A resonance peak in R(xx) is observed in the quantum Hall regime, which disappears if the impurity is removed. The current-flow pattern at the peak clearly shows the coupling of edge states on opposite edges through the impurity, thus confirming the model proposed by Jain and Kivelson [Phys. Rev. Lett. 60, 1542 (1988)]. A clear signature of the impurity-bound state is also observed in the local density of states. Further confirmation is obtained by studying the effect of the size of the impurity on the location and height of the peak.

引用

页码：14333 / 14336

页数：4