Composite Fermions with a Warped Fermi Contour

M. A. Mueed, D. Kamburov, Yang Liu, M. Shayegan, L. N. Pfeiffer, K. W. West, K. W. Baldwin, R. Winkler

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Abstract

Via measurements of commensurability features near the Landau filling factor v=1/2, we probe the shape of the Fermi contour for hole-flux composite fermions confined to a wide GaAs quantum well. The data reveal that the composite fermions are strongly influenced by the characteristics of the Landau level in which they are formed. In particular, their Fermi contour is warped when their Landau level originates from a hole band with significant warping.

Original languageEnglish (US)
Article number176805
JournalPhysical review letters
Volume114
Issue number17
DOIs
StatePublished - Apr 29 2015

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Mueed, M. A., Kamburov, D., Liu, Y., Shayegan, M., Pfeiffer, L. N., West, K. W., Baldwin, K. W., & Winkler, R. (2015). Composite Fermions with a Warped Fermi Contour. Physical review letters, 114(17), [176805]. https://doi.org/10.1103/PhysRevLett.114.176805