POSSIBLE MECHANISM FOR THE BREAKDOWN OF THE QUANTUM HALL-EFFECT

被引:17
|
作者
DYAKONOV, MI [1 ]
机构
[1] AF IOFFE PHYSICOTECH INST,LENINGRAD 194021,USSR
关键词
D O I
10.1016/0038-1098(91)90626-7
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
A quite simple mechanism of nonlinear current-voltage dependence in the quantum Hall effect regime is proposed. It is based on the specific electrostatics of a 2D strip and on the strong concentration dependence of sigma-xx, and does not rely on any microscopic nonlinearities in the local relation between current and electric field. It is shown that the predicted electric field and current density scales of nonlinearities in the current-voltage dependence are in agreement with experiments. Nonlinear corrections for low voltages are derived, while what happens at high voltages still remains to be understood.
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页码:817 / 821
页数:5
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