Hopping transport and electrical conductivity in one-dimensional systems with off-diagonal disorder

被引：4
|
作者：
Ma, Songshan [1 ]
Xu, Hui [1 ]
Li, Yanfeng [1 ]
Song, Zhaoquan [1 ]
机构：
[1] Cent S Univ, Sch Phys Sci & Technol, Changsha 410083, Peoples R China
来源：
PHYSICA B-CONDENSED MATTER | 2007年 / 398卷 / 01期
基金：
高等学校博士学科点专项科研基金;
关键词：
one-dimensional systems; off-diagonal disorder; hopping transport; electrical conductivity;
D O I：
10.1016/j.physb.2007.04.067
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
In this paper, we present a model to describe hopping transport and electrical conductivity of one-dimensional systems with off-diagonal disorder, in which electrons are transported via hopping between localized states. We find that off-diagonal disorder leads to delocalization and drastically enhances the electrical conductivity of systems. The model also quantitatively explains the temperature and electrical field dependence of the conductivity in one-dimensional systems with off-diagonal disorder. In addition, we also show the dependence of the conductivity on the strength of off-diagonal disorder. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：55 / 59
页数：5
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