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

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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• Lateral Josephson effect on the surface of Co${}_3$Sn${}_2$S${}_2$ magnetic Weyl semimetal
• Multivalued current-phase relationship in a.c. Josephson effect for a three-dimensional Weyl semimetal WTe${}_2$
• A flux tunable superconducting quantum circuit based on Weyl semimetal MoTe2
• Interface superconductivity in a type-II Dirac semimetal NiTe${}_2$
• Josephson spin-valve realization in the magnetic nodal-line topological semimetal Fe${}_3$GeTe${}_2$
• Equilibrium current in a Weyl-semimetal - superconductor heterostructure
• Band gap reconstruction at the interface between black phosphorus and a gold electrode
• Andreev reflection for MnTe altermagnet candidate
• Reentrant proximity-induced superconductivity for GeTe semimetal
• Second-harmonic voltage responce for the magnetic Weyl semimetal Co${}_3$Sn${}_2$S${}_2$
• Spin wave effects in transport between a ferromagnet and a Weyl semimetal surface
• Josephson diode and spin-valve effects on the surface of altermagnet CrSb
• Coalescence of Andreev bound states on the surface of a chiral topological semimetal
• Fractional ac Josephson effect as evidence of topological hinge states in a Dirac semimetal NiTe2