Disordered weak and strong topological insulators

Koji Kobayashi, Tomi Ohtsuki, Ken Ichiro Imura

研究成果: Article査読

73 被引用数 (Scopus)

抄録

A global phase diagram of disordered weak and strong topological insulators is established numerically. As expected, the location of the phase boundaries is renormalized by disorder, a feature recognized in the study of the so-called topological Anderson insulator. Here, we report unexpected quantization, i.e., robustness against disorder of the conductance peaks on these phase boundaries. Another highlight of the work is on the emergence of two subregions in the weak topological insulator phase under disorder. According to the size dependence of the conductance, the surface states are either robust or "defeated" in the two subregions. The nature of the two distinct types of behavior is further revealed by studying the Lyapunov exponents.

本文言語English
論文番号236803
ジャーナルPhysical review letters
110
23
DOI
出版ステータスPublished - 2013 6 5
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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