Manipulation of Vortices to control the Chiral Andreev Edge States

ORAL

Abstract

At the interface between a superconductor and a quantum Hall (QH) region, the QH edge states are proximitized to form the chiral Andreev edge states (CAES). We have previously shown that the interference of CAES is highly sensitive to the configuration of the vortices in the superconductor. By modifying the design of the superconducting electrode, we can manipulate the configuration of vortices, which allows us to both explore the properties of the CAES and to use the non-local CAES interference as an effective probe of the vortex configuration. The study and control of the vortices and the CAES are an important step in the development of chiral superconducting devices.

*Funding acknowledgement: Transport measurements by J.M., C.-C.C., L.Z., and G.F. were supported by Division of Materials Sciences and Engineering, Office of Basic Energy Sciences, U.S. Department of Energy, under Award No. DE-SC0002765. Sample fabrication and characterization by J.M., C.-C.C., and L.Z. was supported by the NSF Award DMR-2004870. F.A. was supported by a URC grant at Appalachian State University. K.W. and T.T. acknowledge support from JSPS KAKENHI (Grant Numbers 19H05790, 20H00354 and 21H05233). The sample fabrication was performed in part at the Duke University Shared Materials Instrumentation Facility (SMIF), a member of the North Carolina Research Triangle Nanotechnology Network (RTNN), which is supported by the National Science Foundation (Grant ECCS-1542015) as part of the National Nanotechnology Coordinated Infrastructure (NNCI).

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Presenters

  • Jordan McCourt

    • Duke University

Authors

  • Jordan McCourt

    • Duke University

  • Chun-Chia Chen

    • Duke University

  • Lingfei Zhao

    • Duke University

  • Kenji Watanabe

    • National Institute for Materials Science
    • Research Center for Functional Materials, National Institute of Materials Science
    • Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-044, Japan
    • NIMS
    • Research Center for Functional Materials, National Institute for Materials Science
    • National Institute for Materials Science, Japan
    • Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Japan
    • NIMS Japan

  • Takashi Taniguchi

    • National Institute for Materials Science
    • Kyoto Univ
    • International Center for Materials Nanoarchitectonics, National Institute of Materials Science
    • Kyoto University
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-044, Japan
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • National Institute for Materials Science, Japan
    • National Institute For Materials Science
    • NIMS
    • National Institute for Material Science
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, Japan
    • NIMS Japan

  • Francois Amet

    • Appalachian State University

  • Gleb Finkelstein

    • Duke University