Quantum Hall Nematic States in Graphene

ORAL

Abstract

In the quantum Hall effect at millikelvin temperatures, specific half-filled Landau levels in gallium arsenide show striking anisotropy in magnetotransport. Theoretical predictions and scanning gate microscopy measurements suggest these states are quantum Hall nematics: the partitioning of what is on average a half-filled Landau level into periodic stripes of integer-filled landau levels with long-range directional order. While this transport anisotropy has been observed in high-mobility GaAs two-dimensional electron gases, there is no clear evidence of quantum hall nematic states in graphene. Here, we discuss transport measurements of graphene at half-filling with geometries designed to identify transport anisotropy that is the signature of the quantum Hall nematic state.

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Authors

  • Derrick Boone

    • Stanford Univ

  • Aaron Sharpe

    • Stanford Univ

  • Wenmin Yang

    • Stanford Univ

  • Arthur Barnard

    • Department of Physics, Stanford University, Stanford, California 94305, USA
    • Stanford Univ

  • David Goldhaber-Gordon

    • Stanford Univ

  • Rakashi Taniguchi

    • Japanese National Institute of Materials Science

  • Kenji Watanabe

    • Japanese National Institute of Materials Science
    • Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan
    • National Institute for Materials Science