Adiabatic continuity between Hofstadter and Chern insulator states

Ying Hai Wu, J. K. Jain, Kai Sun

Research output: Contribution to journalArticle

35 Scopus citations

Abstract

We show that the topologically nontrivial bands of Chern insulators are adiabatic cousins of the Landau bands of Hofstadter lattices. We demonstrate adiabatic connection also between several familiar fractional quantum Hall states on Hofstadter lattices and the fractional Chern insulator states in partially filled Chern bands, which implies that they are in fact different manifestations of the same phase. This adiabatic path provides a way of generating many more fractional Chern insulator states and helps clarify that nonuniformity in the distribution of the Berry curvature is responsible for weakening or altogether destroying fractional topological states.

Original languageEnglish (US)
Article number165129
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume86
Issue number16
DOIs
StatePublished - Oct 22 2012

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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