New Excitation at the Interface between High-Temperature Superconductors and Topological Insulators

ORAL

Abstract

There has been an increased interest in the interplay between d-wave superconducting order parameter and helical surface states of a topological insulator, due to the recent theoretical proposals predicting the emergence of novel excitations at these interfaces. Motivated by these intriguing proposals, we fabricated high-temperature superconductor/topological insulator junctions by the mechanical bonding method [1]. We report the observation of a zero-bias conductance peak (ZBCP) at temperatures below the critical temperature of the bulk superconductor. The ZBCP in our data indicates the emergence of a new excitation in our devices. I will present a detailed study of the differential conductance measurement of our samples at various temperatures and magnetic fields.\\[4pt] [1] P. Zareapour, et al., Nature Communications 3, 1056 (2012).

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Authors

  • Parisa Zareapour

    • Department of Physics and Institute for Optical Sciences, University of Toronto

  • Alex Hayat

    • Department of Physics and Institute for Optical Sciences, University of Toronto

  • Shu Yang Frank Zhao

    • Department of Physics and Institute for Optical Sciences, University of Toronto

  • Michael Kreshchuk

    • Department of Physics and Institute for Optical Sciences, University of Toronto

  • Yong Kiat Lee

    • Department of Physics and Institute for Optical Sciences, University of Toronto

  • Anjan Reijnders

    • University of Toronto
    • Department of Physics and Institute for Optical Sciences, University of Toronto

  • Achint Jain

    • Department of Physics and Institute for Optical Sciences, University of Toronto

  • Zhijun Xu

    • Brookhaven National Laboratory

  • Alina Yang

    • Brookhaven National Laboratory

  • Genda Gu

    • Brookhaven National Laboratory
    • Condensed Matter Physics and Materials Science Department, Brookhaven National laboratory
    • Brookhaven Natl Lab
    • Brookhaven National Lab
    • Brookhaven National Labs

  • Shuang Jia

    • Department of Chemistry, Princeton University

  • Robert Cava

    • Department of Chemistry, Princeton University
    • Department of Chemistry, Princeton university, Princeton NJ 08544 USA
    • Princeton University Chemistry Department
    • Institute for Quantum Matter, Princeton University
    • Department of Chemistry, Princeton University, NJ, 08544, USA
    • Princeton University

  • Kenneth Burch

    • Department of Physics and Institute for Optical Sciences, University of Toronto