Conductance spectroscopy of Andreev bound states in multi-terminal Josephson junctions

ORAL

Abstract

Multi-terminal Josephson junctions (JJs) can host unconventional Andreev bound states (ABSs) of which the energy levels depend on multiple superconducting phases. It is interesting that zero-energy ABSs may exist in multi-terminal JJs [1]. A recent report of critical current measurements on multi-terminal JJs implies the existence of multi-terminal ABSs [2]. In addition, we study conductance spectroscopy through quantum point contacts between multi-terminal JJs and normal leads. Device fabrications and phase-dependent conductance on multi-terminal JJs will be discussed.

[Ref. 1] Riwar et al. "Multi-terminal Josephson junctions as topological matter." Nat Commun 7, 11167 (2016).
[Ref. 2] Pankratova, et al. "Multiterminal Josephson Effect." Physical Review X 10.3 (2020): 031051.

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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
    • Department of Physics, University of Maryland

  • Kaushini S Wickramasinghe

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

  • Maxim G Vavilov

    • University of Wisconsin-Madison
    • Department of Physics and Wisconsin Quantum Institute, University of Wisconsin - Madison
    • University of Wisconsin - Madison
    • University of Wisconsin - Madison, Madison
    • Department of Physics, University of Wisconsin-Madison
    • University of Wisconsin, Madison

  • Javad Shabani

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

  • Vladimir Manucharyan

    • University of Maryland, College Park
    • Department of Physics, University of Maryland
    • University of Maryland