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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