Andreev Reflection in Fermi Arc Surface States of Weyl Semimetals

Abstract

Fermi arc surface states are the hallmark of Weyl semimetals, whose identification is usually challenged by their coexistence with gapless bulk states. Surface transport measurements by fabricating setups on the sample boundary provide a natural solution to this problem. Here, we study the Andreev reflection (AR) in a planar normal metal-superconductor junction on the Weyl semimetal surface with a pair of Fermi arcs. For a conserved transverse momentum, the occurrence of normal reflection depends on the relative orientation between the Fermi arcs and the normal of the junction, which is a direct result of the disconnected Fermi arcs. Consequently, a crossover from the suppressed to perfect AR occurs with varying the orientation of the planar junction, giving rise to a change from double-peak to plateau structure in conductance spectra. Moreover, such a crossover can be facilitated by imposing a magnetic field, making electrons slide along the Fermi arcs so as to switch between two regimes of the AR. Our results provide a decisive signature for the detection of Fermi arcs and open the possibilities of exploring novel phenomenology through their interplay with superconductivity.

arXiv comment9pages, 5figures

References in corpus (55)

• Double-slit photoelectron interference in strong-field ionization of the neon dimer
• Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
• Weyl and Dirac Semimetals in Three Dimensional Solids
• Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
• Weyl Semimetal in a Topological Insulator Multilayer
• Experimental discovery of Weyl semimetal TaAs
• Theoretical Discovery/Prediction: Weyl Semimetal states in the TaAs material (TaAs, NbAs, NbP, TaP) class
• Observation of the chiral anomaly induced negative magneto-resistance in 3D Weyl semi-metal TaAs
• Weyl semimetal phase in non-centrosymmetric transition metal monophosphides
• Chiral Anomaly and Classical Negative Magnetoresistance of Weyl Metals
• Kwant: a software package for quantum transport
• Phase transition between the quantum spin Hall and insulator phases in 3D: emergence of a topological gapless phase
• Extremely large magnetoresistance and ultrahigh mobility in the topological Weyl semimetal NbP
• Observation of Weyl nodes in TaAs
• Discovery of a Weyl Fermion semimetal state in NbAs
• Topological response in Weyl semimetals and the chiral anomaly
• Quantum Hall effects in a Weyl Semi-Metal: possible application in pyrochlore Iridates
• Experimental observation of topological Fermi arcs in type-II Weyl semimetal MoTe2
• Signatures of the Adler-Bell-Jackiw chiral anomaly in a Weyl Fermion semimetal
• Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co3Sn2S2
• Prediction of the Weyl semimetal in the orthorhombic MoTe2
• The chiral anomaly and thermopower of Weyl fermions in the half-Heusler GdPtBi
• Quantum Oscillations from Surface Fermi-Arcs in Weyl and Dirac Semi-Metals
• Spectroscopic evidence for type II Weyl semimetal state in MoTe2
• Coexistence of the topological state and a two-dimensional electron gas on the surface of Bi2Se3
• Large tuneable Rashba spin splitting of a two-dimensional electron gas in Bi2Se3
• Observation of the Type-II Weyl Semimetal Phase in MoTe2
• Experimental discovery of a topological Weyl semimetal state in TaP
• MoTe2: A Type-II Weyl Topological Metal
• Chiral anomaly and transport in Weyl metals
• Observation of Weyl nodes and Fermi arcs in TaP
• Reactive chemical doping of the $B{i}_{2}S{e}_3$ topological insulator
• Adler-Bell-Jackiw anomaly in Weyl semi-metals: Application to Pyrochlore Iridates
• Gyrotropic magnetic effect and the magnetic moment on the Fermi surface
• TaIrTe4 a ternary Type-II Weyl semi-metal
• Fermi arcs and their topological character in the candidate type-II Weyl semimetal MoTe2
• Helicity protected ultrahigh mobility Weyl fermions in NbP
• Discovery of a new type of topological Weyl fermion semimetal state in Mo${}_x$W${}_{1-x}$Te${}_2$
• Chiral magnetic effect and natural optical activity in (Weyl) metals
• Magneto-transport phenomena related to the chiral anomaly in Weyl semimetals
• Observation of Fermi arc spin texture in TaAs
• A condensed matter realization of the axial magnetic effect
• Experimental realization of type-II Weyl state in non-centrosymmetric TaIrTe${}_4$
• Topological Invariants of Metals and Related Physical Effects
• Spin polarization and texture of the Fermi arcs in the Weyl Fermion semimetal TaAs
• Unsaturated both large positive and negative magnetoresistance in Weyl Semimetal TaP
• Specular Andreev Reflection in Inversion-symmetric Weyl-semimetals
• Observation of Weyl nodes in robust type-II Weyl semimetal WP2
• Superconducting proximity effect and Majorana flat bands in the surface of a Weyl semimetal
• Anomalous Fraunhofer patterns in gated Josephson junctions based on the bulk-insulating topological insulator BiSbTeSe2
• Proposal for detecting nodal-line semimetal surface-states with resonant spin-flipped reflection
• Andreev Reflection in Weyl Semimetals
• Appearance of the universal value $e^2/h$ of the zero-bias conductance in a Weyl semimetal-superconductor junction
• Influence of a chiral chemical potential on Weyl hybrid junctions
• Detection of Fermi Arcs in Weyl Semimetals through Surface Negative Refraction

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