Beyond exponential localization in one-dimensional electrified chains

被引:1
|
作者
Farchioni, R [1 ]
Grosso, G [1 ]
机构
[1] IST NAZL FIS MAT,I-56126 PISA,ITALY
关键词
D O I
10.1088/0953-8984/9/23/001
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
We interpret a new kind of localization in a finite one-dimensional tight-binding model under a weak applied electric field. This phenomenon is quite general and manifests itself in a more than exponential decreasing behaviour of the chain transmittivity. We provide analytic expressions for the transmittivity and confirm the theoretical results by transfer matrix numerical calculations. We show that this phenomenon is present in ordered as well as in aperiodic (incommensurate and pseudorandom systems) irrespective of the number of allowed bands.
引用
收藏
页码:L331 / L337
页数:7
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