Suppression of Anderson localization in a graphene sheet applied by a random voltage pattern

被引：2

作者：

Jiang, Hai-tao ^{[1
]}

Zhang, Jie-fei ^{[1
]}

Wang, Zi-li ^{[1
]}

Li, Yun-hui ^{[1
]}

Chen, Hong ^{[1
]}

机构：

[1] Tongji Univ, Dept Phys, MOE, Key Lab Adv Microstruct Mat, Shanghai 200092, Peoples R China

来源：

PHYSICS LETTERS A | 2012年 / 376卷 / 17期

基金：

中国国家自然科学基金;

关键词：

Graphene; Anderson localization; Phase compensation; TRANSMISSION; FINITE;

D O I：

10.1016/j.physleta.2012.03.026

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We theoretically study the transport of electronic waves through a graphene sheet applied by a random voltage pattern in which the magnitudes and/or the widths of the voltages are random. When the magnitudes of the voltages exceed the electronic energy, the applied region can be considered as left-handed (LH) layers. Compared to the disordered structures with right-handed (RH) layers only, the spectra of the (average) density of states and the localization lengths in mixed random structures with RH and LH layers all show the suppression of Anderson localization, owing to the phase compensation effect of LH layers that reduces the long-range interference in the random system. (c) 2012 Elsevier B.V. All rights reserved.

引用

页码：1509 / 1514

页数：6

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