Quantum Hall stripes with a reduced transport anisotropy at half-filled Landau levels in GaAs quantum wells

POSTER

Abstract

It is well known that the hard (easy) resistance due to formation of quantum Hall stripes in high Landau levels of a two-dimensional electron gas exhibits a maximum (minimum) at half-integer filling factors. Here, we report the opposite behavior, namely a local minimum (maximum) in the hard (easy) resistance at half-filling. This talk will discuss our experimental observations in several samples including the temperature dependence of the resistance anisotropy and the response to the in-plane magnetic field applied parallel or perpendicular to the native stripes.

Presenters

  • Michael Zudov

    University of Minnesota, Physics, University of Minnesota

Authors

  • Michael Zudov

    University of Minnesota, Physics, University of Minnesota

  • Xiaojun Fu

    University of Minnesota

  • Qianhui Shi

    University of Minnesota, Columbia University

  • Geoffrey Gardner

    Department of Physics and Astronomy, Purdue University, Purdue University, Birck Nano Technology Center, Purdue University, Dept. of Physics, Purdue University, Department of Physics and Astronomy and Station Q Purdue, Purdue University, Department of Physics and Astronomy, Station Q Purdue, and Birck Nanotechnology Center, Purdue University

  • John Watson

    Purdue University

  • Michael Manfra

    Purdue University, Microsoft, Department of Physics and Astronomy and Station Q Purdue, Purdue University, Department of Physics and Astronomy, Purdue University, Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907 USA, Microsoft Station Q Purdue, Physics and Astronomy, Purdue University, Department of Physics and Astronomy, School of Materials Engineering and School of Electrical and Computer Engineering, Purdue University, Station Q Purdue and Department of Physics and Astronomy, Purdue University, Dept. of Physics, Purdue University, Department of Physics and Astronomy and Station Q Purdue, Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA, Dept. of Physics and Astronomy, Purdue, Purdue University, Station Q Purdue, Department of Physics and Astronomy, Station Q Purdue, and Birck Nanotechnology Center, Purdue University

  • K. W. Baldwin

    Electrical Engineering, Princeton University, Princeton University

  • Loren Pfeiffer

    Electrical Engineering, Princeton University, Princeton University, Princeton Univ, Department of Electrical Engineering, Princeton University, PRISM, Princeton University, Physics, Princeton University, Electrical Engineering, Princeton

  • Kenneth West

    Electrical Engineering, Princeton University, Princeton University, Princeton Univ, Department of Electrical Engineering, Princeton University, PRISM, Princeton University, Physics, University of Pittsburgh, Electrical Engineering, Princeton