Two-dimensional electron gases in the quantum Hall regime: Analysis of the circulating current in contactless Corbino geometry

被引：3

作者：

Petersen, CL ^{[1
]}

Hansen, OP ^{[1
]}

机构：

[1] UNIV COPENHAGEN,NIELS BOHR INST,OERSTED LAB,DK-2100 COPENHAGEN O,DENMARK

来源：

SOLID STATE COMMUNICATIONS | 1996年 / 98卷 / 11期

关键词：

quantum Hall effect;

D O I：

10.1016/0038-1098(96)00184-6

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have investigated the magnitude of the circulating bulk current density in Corbino geometry with high-impedance capacitive contacts using: a two-dimensional distributed model. For parameters suited for GaAlAs/GaAs heterostructure samples we find that local current densities can attain values larger than 1 A/m, at which a breakdown of the quantum Hall effect might be expected. The circulating current is found to be sufficiently large to allow inductive detection, and we suggest this as a method to measure sigma(xy). Copyright (C) 1996 Elsevier Science Ltd

引用

页码：947 / 950

页数：4

共 13 条

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