Observation of reentrant integer quantum hall states in the lowest landau level

Yang Liu, C. G. Pappas, M. Shayegan, L. N. Pfeiffer, K. W. West, K. W. Baldwin

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

Measurements on very low disorder two-dimensional electrons confined to relatively wide GaAs quantum well samples with tunable density reveal a close competition between the electron liquid and solid phases near the Landau level filling factor ν=1. As the density is raised, the fractional quantum Hall liquid at ν=4/5 suddenly disappears at a well-width dependent critical density, and then reappears at higher densities with insulating phases on its flanks. These insulating phases exhibit reentrant ν=1 integer quantum Hall effects and signal the formation of electron Wigner crystal states. Qualitatively similar phenomena are seen near ν=6/5.

Original languageEnglish (US)
Article number036801
JournalPhysical review letters
Volume109
Issue number3
DOIs
StatePublished - Jul 17 2012

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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