Surface acoustic waves and the magnetoconductivity of a two-dimensional electron gas

被引：1
|
作者：
Eskildsen, MR [1 ]
Smith, H [1 ]
机构：
[1] HC ORSTED INST,ORSTED LAB,COPENHAGEN,DENMARK
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 1996年 / 8卷 / 36期
关键词：
D O I：
10.1088/0953-8984/8/36/012
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The frequency- and wavevector-dependent conductivity tensor of a two-dimensional electron gas is determined within a semiclassical model containing two different characteristic times, a transport time and a lifetime. The velocity Shift of a surface acoustic wave, caused by the piezoelectric coupling, is calculated as a function of magnetic field. The results are applicable under conditions where the frequency of the surface acoustic wave is comparable to the cyclotron frequency. The calculated velocity shift is compared to that observed for composite fermions in the quantum Hall regime near half-filling.
引用
收藏
页码：6597 / 6605
页数：9
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