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arXiv · 1801.09551

Realization of a double-slit SQUID geometry by Fermi arc surface states in a WTe$_2$ Weyl semimetal

O. O. Shvetsov·A. Kononov·A. V. Timonina·N. N. Kolesnikov·E. V. Deviatov
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Abstract

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~$\mu$m 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 SQUID geometry, realized by coupling the opposite WTe$_2$ crystal surfaces.

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O. O. Shvetsov, A. Kononov, A. V. Timonina, N. N. Kolesnikov, E. V. Deviatov. 2018-01-29. Realization of a double-slit SQUID geometry by Fermi arc surface states in a WTe$_2$ Weyl semimetal. https://doi.org/10.1134/s0021364018120020

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