Strain-induced resistance anisotropy of GaAs two-dimensional electrons

ORAL

Abstract

We report strain-dependent low temperature magnetotransport measurements of two-dimensional electrons confined in GaAs single quantum wells. The samples are mounted to a piezoelectric-based strain device with which we can apply, and vary, tensile strain in the quantum well in situ. With this apparatus we have achieved strain as large as ~0.3% in GaAs quantum wells at cryogenic temperatures. We find that with increasing strain the magnetoresistance of the two-dimensional electron system confined in the quantum well becomes anisotropic relative to the principle in-plane axes of the host crystal. Additionally, we find that this strain-induced resistance anisotropy exhibits hysteresis in the vicinity of Landau Level filling factor ν=5/2.

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Presenters

  • Alexander Stern

    Department of Physics and Astronomy, Univ of California - Irvine

Authors

  • Alexander Stern

    Department of Physics and Astronomy, Univ of California - Irvine

  • Johannes Pollanen

    Department of Physics and Astronomy, Michigan State University, Physics and Astronomy, Michigan State Univ, Department of Physics and Astronomy, Michigan State Univ, Michigan State Univ

  • James Eisenstein

    Condensed Matter Physics, California Institute of Technology

  • K West

    Electrical Engineering, princeton university, Department of Electrical Engineering, Princeton University, Princeton University, Univ of Basel, Princeton Univ, Electrical Engineering, Princeton Univ, EE, Princeton University

  • Loren Pfeiffer

    Electrical Engineering, princeton university, Department of Electrical Engineering, Princeton University, Princeton University, Princeton Univ, Electrical Engineering, Princeton Univ, EE, Princeton University

  • Jing Xia

    Physics and Astronomy, Univ of California - Irvine, Department of Physics and Astronomy, Univ of California - Irvine, University of California Irvine, Department of Physics, University of California, Irvine, Department of Physics and Astronomy, University of California, Irvine