GaAs/AlGaAs heterostructures for interference experiments at the v = 5/2 fractional quantum Hall state

ORAL

Abstract

The quantum Hall state at filling factor 5/2 has been predicted to have non-Abelian excitations. The non-Abelian character of these quasiparticle excitations can be probed through interferometry; however, there are challenges to developing a heterostructure which is suitable for these experiments. The heterostructure must be extremely low disorder, support stable gating, and provide a sharp confining potential. We present details of a heterostructure that achieves these requirements and exhibits high quality magnetotransport. This heterostructure design will be useful for fabricating quantum Hall interferometers.

*This work is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under award number DE-SC0020138.

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Presenters

  • Shuang Liang

    • Purdue University

Authors

  • James R Nakamura

    • Purdue University

  • Shuang Liang

    • Purdue University

  • Tanmay Maiti

    • Purdue University

  • Geoffrey C Gardner

    • Purdue University

  • Michael J Manfra

    • Purdue University, Microsoft Quantum Purdue
    • Purdue University
    • Birck Nanotechnology Center, Purdue University, West Lafayette, IN, USA; Microsoft Quantum Lab, Purdue University, West Lafayette, IN, USA
    • Physics and Astronomy, Purdue University
    • Department of Physics and Astronomy, Birck Nanotechnology Center, School of Electrical and Computer Engineering and Microsoft Quantum Lab West Lafayette, Purdue University
    • Department of Physics and Astronomy and Nanotechnology Center Purdue University, Microsoft Quantum Lab West Lafayette
    • Department of Physics and Astronomy, Birck Nanotechnology Center, School of Materials Engineering and School of Electrical and Computer Engineering, Purdue University