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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.

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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