Topological anderson insulator

Jian Li, Rui Lin Chu, J. K. Jain, Shun Qing Shen

Research output: Contribution to journalArticlepeer-review

289 Scopus citations

Abstract

Disorder plays an important role in two dimensions, and is responsible for striking phenomena such as metal-insulator transition and the integral and fractional quantum Hall effects. In this Letter, we investigate the role of disorder in the context of the recently discovered topological insulator, which possesses a pair of helical edge states with opposing spins moving in opposite directions and exhibits the phenomenon of quantum spin Hall effect. We predict an unexpected and nontrivial quantum phase termed "topological Anderson insulator," which is obtained by introducing impurities in a two-dimensional metal; here disorder not only causes metal-insulator transition, as anticipated, but is fundamentally responsible for creating extended edge states. We determine the phase diagram of the topological Anderson insulator and outline its experimental consequences.

Original languageEnglish (US)
Article number136806
JournalPhysical Review Letters
Volume102
Issue number13
DOIs
StatePublished - Mar 30 2009

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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