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

We experimentally study electron transport between two superconducting indium leads, coupled to the WTe 2 crystal surface. WTe 2 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...

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Bibliographic Details
Published in:JETP letters 2018-06, Vol.107 (12), p.774-779
Main Authors: Shvetsov, O. O., Kononov, A., Timonina, A. V., Kolesnikov, N. N., Deviatov, E. V.
Format: Article
Language:English
Subjects:
Atomic
Biological and Medical Physics
Biophysics
Condensed Matter
Crystal surfaces
Electron transport
Molecular
Optical and Plasma Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Quantum Information Technology
Solid State Physics
Spintronics
Superconducting quantum interference devices
Superconductivity
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Summary:We experimentally study electron transport between two superconducting indium leads, coupled to the WTe 2 crystal surface. WTe 2 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–WTe 2 –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 WTe 2 crystal surfaces.
ISSN:0021-3640
1090-6487
DOI:10.1134/S0021364018120020