Effect of ionization of impurity centres by electric field on the conductivity of superlattice

被引：2
|
作者：
Mensah, SY
Allotey, FKA
Clement, A
机构：
[1] UNIV CAPE COAST,DEPT PHYS,LASER & FIBRE OPT CTR,CAPE COAST,GHANA
[2] ATOM ENERGY COMMISS,ACCRA,GHANA
来源：
SUPERLATTICES AND MICROSTRUCTURES | 1996年 / 19卷 / 02期
关键词：
D O I：
10.1006/spmi.1996.0018
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The electric field E(0) effect on ionization on impurity centres and on the conductivity of superlattices (SLs) has been studied theoretically. It is observed that as the field E(0) increases the current rises, reaches a maximum, then falls off, i.e. show a negative differential conductivity (NDC). Further increase in E(0) leads to an exponential rise of the current. This occurs around E(0) = 3 x 10(4) V cm(-1). Hence the current density field shows a 'N' shape characteristics as against the 'n' shape characteristics in the absence of impurity. (C) 1996 Academic Press Limited
引用
收藏
页码：151 / 158
页数：8
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