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Multi-terminal superconducting quantum interference device

ORAL

Abstract

External flux control of the superconducting phase difference is predicted to be a powerful tool to generate and manipulate Majorana bound states in a topological multi-terminal Josephson Junction (JJ). We study multi-terminal superconducting quantum interference devices (SQUID) fabricated from a semiconductor/superconductor (InAs/Al) heterostructure. Such a device consists of superconducting loops connecting some of terminals of a multi-terminal JJ. Due to non-local superconducting coherence, we observe for the first time an effect of “dragging” of the phase difference between one pair of terminals produced by the flux applied through the loop connecting two other terminals. Our ground state measurement implies the existence of novel multi-terminal Andreev bound states (ABS) which depend on more than two superconducting phase differences. Progress in tunneling spectroscopy of such states will also be discussed.

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Presenters

  • Hanho Lee

    University of Maryland, College Park

Authors

  • Hanho Lee

    University of Maryland, College Park

  • Natalia Pankratova

    University of Maryland, College Park

  • Roman Kuzmin

    University of Maryland, College Park

  • Kaushini S Wickramasinghe

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

  • Maxim G Vavilov

    University of Wisconsin-Madison, Department of Physics, University of Wisconsin - Madison, University of Wisconsin - Madison

  • Javad Shabani

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

  • Vladimir Manucharyan

    Physics, Univ of Maryland-College Park, University of Maryland, College Park, University of Maryland - College Park, University of Maryland