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Magneto-Optical and Magneto-Transport Studies of Near Surface InAs Quantum Wells

ORAL

Abstract

Near surface InAs quantum wells (QWs) have recently attracted interest as tools to explore mesoscopic and topological superconductivity. These shallow narrow gap QWs can interact strongly with superconducting layers. In this talk, we present a combined magneto-optical, magneto-transport, and theoretical approach to study the band structure of these QWs. The effective mass and g-factors in these QWs were determined using high field cyclotron resonance (CR). The band parameters extracted from our CR experiments are consistent with those obtained from Shubnikov de Hass measurements and agree remarkably well with the theoretical calculations. Our band structure models include strong mixing of the conduction and valence bands which leads to a large non-parabolicity. The calculations accurately describe the experimental observations and allowing us to accurately map the effective mass and g-factor as a function of magnetic field, Landau level index, and the well width for different near surface InAs QWs.

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Presenters

  • Brenden A Magill

    Virginia Tech, Physics, Virginia Tech

Authors

  • Brenden A Magill

    Virginia Tech, Physics, Virginia Tech

  • Giti Khodaparast

    Virginia Tech, Physics, Virginia Tech

  • Sunil Thapa

    Univ. of Florida, University of Florida

  • Christopher J Stanton

    Univ. of Florida, University of Florida

  • Joseph Yuan

    New York Univ NYU, Center for Quantum Phenomena, Department of Physics, New York University, NYU, Center for Quantum Phenomena, Department of Physics, New York University, New York, New York

  • Mehdi Hatefipour

    NYU, New York Univ NYU

  • William a Mayer

    New York Univ NYU, Center for Quantum Phenomena, Department of Physics, New York University, NYU

  • Matthieu Dartiailh

    New York Univ NYU, Center for Quantum Phenomena, Department of Physics, New York University, NYU, Center for Quantum Phenemena, Department of Physics, New York University, Center for Quantum Phenomena, Department of Physics, New York University, New York, New York

  • Kasra Sardashti

    New York Univ NYU, Center for Quantum Phenomena, Department of Physics, New York University, NYU

  • Kaushini S Wickramasinghe

    New York Univ NYU, Center for Quantum Phenomena, Department of Physics, New York University, NYU, New York University

  • Javad Shabani

    New York Univ NYU, Center for Quantum Phenomena, Department of Physics, New York University, NYU, Center for Quantum Phenemena, Department of Physics, New York University, New York University, Center for Quantum Phenomena, Department of Physics, New York University, New York, New York

  • Yasuhiro Matsuda

    ISSP, University of Tokyo, University of Tokyo

  • Zhuo Yang

    ISSP, University of Tokyo, University of Tokyo, The University of Tokyo

  • Yoshimitsu Kohama

    ISSP, University of Tokyo, University of Tokyo, the University of Tokyo, The University of Tokyo