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.

–

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