Collapse of the fractional quantum Hall effect in an electron system with large layer thickness

M. Shayegan, J. Jo, Y. W. Suen, M. Santos, V. J. Goldman

Research output: Contribution to journalArticlepeer-review

56 Scopus citations

Abstract

We report the first experimental study of the energy gap for the fractional quantum Hall states at Landau-level filling factors =1/3 and 2/3 in a variable-width electron system realized in a selectively doped, parabolic, AlGaAs quantum well. We observe a dramatic decrease in the measured energy gaps as the electron-layer thickness increases and the electric-subband separation decreases, which we interpret as the collapse of the correlated fractional states.

Original languageEnglish (US)
Pages (from-to)2916-2919
Number of pages4
JournalPhysical review letters
Volume65
Issue number23
DOIs
StatePublished - Jan 1 1990

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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