ACOUSTOELECTRIC EFFECT IN A SEMICONDUCTOR SUPERLATTICE

被引：10
|
作者：
MENSAH, SY
ALLOTEY, FKA
ADJEPONG, SK
机构：
[1] ATOM ENERGY COMMISS,ACCRA,GHANA
[2] UNIV CAPE COAST,DEPT PHYS,CAPE COAST,GHANA
[3] UN EDUC & CULTURAL ORG,TRIESTE,ITALY
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 1994年 / 6卷 / 34期
关键词：
Acoustoelectric current - Homogeneous bulk material;
D O I：
10.1088/0953-8984/6/34/010
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The acoustoelectric effect in a semiconductor superlattice has been studied for an acoustic wave whose wavelength lambda = 2pi/q is smaller than the mean free path l of the electrons (where ql much greater than 1). Unlike the homogeneous bulk material where the Weinreich relation is independent of the wavenumber q in the superlattice we observe a dependence on q, i.e. spatial dispersion. In the presence of an applied constant field E a threshold value was obtained where the acoustoelectric current changes direction.
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页码：6783 / 6787
页数：5
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