Microwave Studies of Josephson Junctions Based on InAs Quantum Wells with an Epitaxial Superconductor

ORAL

Abstract

Two-dimensional electron gases (2DEGs) with strong spin-orbit coupling are expected to host topological states in the presence of superconductivity and broken time-reversal symmetry. Josephson junctions based on such 2DEGs are predicted to exhibit an unconventional current-phase relation, characterized by a large component at twice the Josephson frequency due to the presence of gapless topological Andreev bound states. In order to study the current-phase relation of these bound states, here we characterize the microwave response of Josephson junctions based on InAs quantum wells proximitized with epitaxial Al.

*This work was supported in part by the National Science Foundation.

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Presenters

  • Gino Graziano

    • School of Physics and Astronomy, University of Minnesota

Authors

  • Gino Graziano

    • School of Physics and Astronomy, University of Minnesota

  • Joon Sue Lee

    • University of California Santa Barbara
    • California NanoSystems Institute, University of California, Santa Barbara
    • University of California - Santa Barbara
    • Materials Science, University of California - Santa Barbara
    • Univ of California - Santa Barbara

  • Mihir Pendharkar

    • University of California Santa Barbara
    • Department of Electrical and Computer Engineering, University of California, Santa Barbara
    • University of California - Santa Barbara
    • Univ of California - Santa Barbara

  • Chris Palmstrom

    • University of California Santa Barbara
    • Materials Department, California NanoSystems Institute, Electrical and Computer Engineering, University of California
    • University of California-Santa Barbara
    • California Nanosystems Institute, Dept. of Electrical and Computer Engineering, and Dept. of Materials, Univ of California - Santa Barbara
    • University of California - Santa Barbara
    • Electronics & Computer Enginneering, University of California Santa Barbara
    • Materials Department, University of California, Santa Barbara
    • Materials, University of California Santa Barbara
    • Univ of California - Santa Barbara

  • Vlad Pribiag

    • School of Physics and Astronomy, University of Minnesota
    • Univ of Minnesota - Twin Cities