Signature of Fermi arc surface states in Andreev reflection at the WTe${}_2$ Weyl semimetal surface

Abstract

We experimentally investigate charge transport through the interface between a niobium superconductor and a three-dimensional WTe${}_2$ Weyl semimetal. In addition to classical Andreev reflection, we observe sharp non-periodic subgap resistance resonances. From an analysis of their positions, magnetic field and temperature dependencies, we can interpret them as an analog of Tomasch oscillations for transport along the topological surface state across the region of proximity-induced superconductivity at the Nb-WTe${}_2$ interface. Observation of distinct geometrical resonances implies a specific transmission direction for carriers, which is a hallmark of the Fermi arc surface states.

arXiv comment5 pages, some misprints has been corrected

References in corpus (21)

• Topological Insulators
• Topological insulators and superconductors
• Weyl and Dirac Semimetals in Three Dimensional Solids
• Classification of topological quantum matter with symmetries
• Type-II Weyl Semimetals
• Titanic Magnetoresistance in WTe2
• Colloquium: Topological Band Theory
• Experimental observation of topological Fermi arcs in type-II Weyl semimetal MoTe2
• Induced Superconductivity in the Quantum Spin Hall Edge
• Observation of Fermi Arcs in Type-II Weyl Semimetal Candidate WTe2
• The Josephson critical current in a long mesoscopic S-N-S junction
• Gate-Tunable Negative Longitudinal Magnetoresistance in the Predicted Type-II Weyl Semimetal WTe2
• Edge-mode Superconductivity in a Two Dimensional Topological Insulator
• Spectroscopic Evidence of Type II Weyl Semimetal State in WTe2
• Observation of Large Topologically Trivial Fermi-Arcs in the Candidate Type-II Weyl Semimetal WTe2
• Probing the helical edge states of a topological insulator by Cooper-pair injection
• Chiral nodes and oscillations in the Josephson current in Weyl semimetals
• Transport spectroscopy of induced superconductivity in the three-dimensional topological insulator HgTe
• Andreev reflection at the edge of a two-dimentional semimetal
• Proximity-induced superconductivity within the InAs/GaSb edge conducting state
• Conductance oscillations and zero-bias anomaly in a single superconducting junction to a three-dimensional $B{i}_{2}T{e}_3$ topological insulator

Cited by in corpus (24)

• One-Dimensional Edge Transport in Few-Layer WTe${}_2$
• Non-linear Hall effect in three-dimensional Weyl and Dirac semimetals
• Superconductivity in type-II Weyl-semimetal WTe2 induced by a normal metal contact
• Self-biased current, magnetic interference response, and superconducting vortices in tilted Weyl semimetals with disorder
• Evolution of Pair Correlation Symmetries and Supercurrent Reversal in Tilted Weyl Semimetals
• Spin-, time- and angle-resolved photoemission spectroscopy on WTe${}_2$
• Lateral Josephson effect on the surface of Co${}_3$Sn${}_2$S${}_2$ magnetic Weyl semimetal
• Greens function of semi-infinite Weyl semimetals
• Multivalued current-phase relationship in a.c. Josephson effect for a three-dimensional Weyl semimetal WTe${}_2$
• Spin-dependent transport through a Weyl semimetal surface
• Conductance spectra of (Nb, Pb, In)/NbP -- superconductor/Weyl semimetal junctions
• Multiple magnon modes in the Co${}_3$Sn${}_2$S${}_2$ Weyl semimetal candidate
• Josephson spin-valve realization in the magnetic nodal-line topological semimetal Fe${}_3$GeTe${}_2$
• Band gap reconstruction at the interface between black phosphorus and a gold electrode
• Equilibrium current in a Weyl-semimetal - superconductor heterostructure
• Evidence of the ferroelectric polarization in charge transport through WTe${}_2$ Weyl semimetal surface
• Dynamic negative capacitance regime in GeTe Rashba ferroelectric
• Magnetically stable zero-bias anomaly in Andreev contact to the magnetic Weyl semimetal Co${}_3$Sn${}_2$S${}_2$
• Tunneling chirality Hall effect in type-I Weyl semimetals
• Tomasch Oscillations as Above-Gap Signature of Topological Superconductivity
• Spin wave effects in transport between a ferromagnet and a Weyl semimetal surface
• Coalescence of Andreev bound states on the surface of a chiral topological semimetal
• Current-induced control of the polarization state in a polar metal based heterostructure SnSe/WTe${}_2$
• Josephson diode and spin-valve effects on the surface of altermagnet CrSb