Tuesday, January 1, 2013

1212.6538 (Juntao Song et al.)

The dependence of topological Anderson insulator on the type of disorder    [PDF]

Juntao Song, Haiwen Liu, Hua Jiang, Qing-feng Sun, X. C. Xie
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.
View original: http://arxiv.org/abs/1212.6538

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