Surface-quantized anomalous hall current and the magnetoelectric effect in magnetically disordered topological insulators

Kentaro Nomura, Naoto Nagaosa

Research output: Contribution to journalArticle

180 Citations (Scopus)

Abstract

We study theoretically the role of quenched magnetic disorder at the surface of topological insulators by numerical simulation and scaling analysis based on the massive Dirac fermion model. This addresses the problem of Anderson localization on chiral anomaly. It is found that all the surface states are localized, while the transverse conductivity is quantized to be ±e22h as long as the Fermi energy is within the bulk gap. This greatly facilitates the realization of the topological magnetoelectric effect proposed by Qi et al. with the surface magnetization direction being controlled by the simultaneous application of magnetic and electric fields.

Original languageEnglish
Article number166802
JournalPhysical Review Letters
Volume106
Issue number16
DOIs
Publication statusPublished - 2011 Apr 18
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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