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arXiv · 1212.6538

The dependence of topological Anderson insulator on the type of disorder

Juntao Song·Haiwen Liu·Hua Jiang·Qing-feng Sun·X. C. Xie
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Abstract

This paper details the investigation of the influence of different disorders in two-dimensional topological insulator systems. Unlike the phase transitions to topological Anderson insulator induced by normal Anderson disorder, a different physical picture arises when bond disorder is considered. Using Born approximation theory, an explanation is given as to why bond disorder plays a different role in phase transition than does Anderson disorder. By comparing phase diagrams, conductance, conductance fluctuations, and the localization length for systems with different types of disorder, a consistent conclusion is obtained. The results indicate that a topological Anderson insulator is dependent on the type of disorder. These results are important for the doping processes used in preparation of topological insulators.

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Juntao Song, Haiwen Liu, Hua Jiang, Qing-feng Sun, X. C. Xie. 2012-12-28. The dependence of topological Anderson insulator on the type of disorder. https://doi.org/10.1103/physrevb.85.195125

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