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VOLUME 107 (2018) | ISSUE 12 | PAGE 803
Realization of a double-slit SQUID geometry by Fermi arc surface states in a WTe2 Weyl semimetal
DOI: 10.7868/S0370274X18120081
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.