Quantitative analysis of the disorder broadening and the intrinsic gap for the ν=52 fractional quantum Hall state

N. Samkharadze, J. D. Watson, G. Gardner, M. J. Manfra, L. N. Pfeiffer, K. W. West, G. A. Csáthy

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

We report a reliable method to estimate the disorder broadening parameter from the scaling of the gaps of the even and major odd denominator fractional quantum Hall states of the second Landau level. We apply this technique to several samples of vastly different densities and grown in different molecular beam epitaxy chambers. Excellent agreement is found between the estimated intrinsic and numerically obtained energy gaps for the ν=5/2 fractional quantum Hall state. Furthermore, we quantify the dependence of the intrinsic gap at ν=5/2 on Landau-level mixing.

Original languageEnglish (US)
Article number121305
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume84
Issue number12
DOIs
StatePublished - Sep 19 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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