Direct current hopping conductance in one-dimensional diagonal disordered systems |
| |
Authors: | Ma Song-Shan Xu Hui Liu Xiao-Liang and Xiao Jian-Rong |
| |
Institution: | Physics School of Science and Technology, Central South University,Changsha 410083, China |
| |
Abstract: | Based on a tight-binding disordered model describing a single electron band,
we establish a direct current (dc) electronic hopping transport conductance
model of one-dimensional diagonal disordered systems, and also derive a dc
conductance formula. By calculating the dc conductivity, the relationships
between electric field and conductivity and between temperature and
conductivity are analysed, and the role played by the degree
of disorder in electronic
transport is studied. The results indicate the conductivity of systems
decreasing with the increase of the degree of disorder, characteristics of
negative differential dependence of resistance on temperature at low
temperatures in diagonal disordered systems, and the conductivity of systems
decreasing with the increase of electric field, featuring the non-Ohm's law
conductivity. |
| |
Keywords: | direct current hopping conductivity diagonal disordered
systems the degree of disorder |
本文献已被 维普 等数据库收录! |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
| 点击此处可从《中国物理 B》下载免费的PDF全文 |
|