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Realization of a Double-Slit SQUID Geometry by Fermi Arc Surface States in a WTe2 Weyl Semimetal

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Abstract

We experimentally study electron transport between two superconducting indium leads, coupled to the WTe2 crystal surface. WTe2 is characterized by presence of Fermi arc surface states, as a predicted type-II Weyl semimetal candidate. We demonstrate Josephson current in unprecedentedly long 5 µm In–WTe2–In junctions, which is confirmed by I–V curves evolution with temperature and magnetic field. The Josephson current is mostly carried by the topological surface states, which we demonstrate in a double-slit superconducting quantum interference device geometry, realized by coupling the opposite WTe2 crystal surfaces.

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Authors and Affiliations

  1. Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow region, 142432, Russia

    O. O. Shvetsov, A. Kononov, A. V. Timonina, N. N. Kolesnikov & E. V. Deviatov

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  1. O. O. Shvetsov
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  2. A. Kononov
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  3. A. V. Timonina
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  4. N. N. Kolesnikov
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  5. E. V. Deviatov
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Correspondence to E. V. Deviatov.

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Shvetsov, O.O., Kononov, A., Timonina, A.V. et al. Realization of a Double-Slit SQUID Geometry by Fermi Arc Surface States in a WTe2 Weyl Semimetal. Jetp Lett. 107, 774–779 (2018). https://doi.org/10.1134/S0021364018120020

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  • DOI: https://doi.org/10.1134/S0021364018120020

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