Probing the helical edge states of a topological insulator by Cooper-pair injection

Abstract

We consider the proximity effect between a singlet s-wave superconductor and the edge of a Quantum Spin Hall (QSH) topological insulator. We establish that Andreev reflection at a QSH edge state/superconductor interface is perfect while nonlocal Andreev processes through the superconductor are totally suppressed. We compute the corresponding conductance and noise.

5 pages, 4 figures

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Cited by in corpus (48)

• Topological insulators and superconductors
• Perfect Andreev Reflection of Helical Edge Modes in InAs/GaSb Quantum Wells
• Ballistic edge states in Bismuth nanowires revealed by SQUID interferometry
• Odd-frequency superconducting pairing in one-dimensional systems
• Spin-helical transport in normal and superconducting topological insulators
• Odd-frequency superconducting pairing and subgap density of states at the edge of a two-dimensional topological insulator without magnetism
• Odd-Frequency Triplet Superconductivity at the Helical Edge of a Toplogical Insulator
• Helical Dirac-Majorana interferometer in a superconductor-topological insulator sandwich structure
• Proposal for an all-electrical measurement of crossed Andreev reflection in topological insulators
• Observation of perfect Andreev reflection due to Klein paradox in a topological superconducting state
• Conductance signatures of odd-frequency superconductivity in quantum spin Hall systems using a quantum point contact
• Tunable hybridization of Majorana bound states at the quantum spin Hall edge
• Evidence for Majorana bound states in transport properties of hybrid structures based on helical liquids
• Perfect crossed Andreev reflection in Dirac hybrid junctions in the quantum Hall regime
• Signature of Fermi arc surface states in Andreev reflection at the WTe${}_2$ Weyl semimetal surface
• Signatures of Rashba spin-orbit interaction in the superconducting proximity effect in helical Luttinger liquids
• Quantum Andreev effect in 2D HgTe/CdTe quantum well-superconductor systems
• Spin-filtered and Spatially Distinguishable Crossed Andreev Reflection in a Silicene-Superconductor Junction
• Quantum interference in topological insulator Josephson junctions
• Enhancement of crossed Andreev reflection in normal-superconductor-normal junction of thin topological insulator
• On-demand thermoelectric generation of equal-spin Cooper pairs
• Current-phase relation of a WTe2 Josephson junction
• Phase-tunable electron transport assisted by odd-frequency Cooper pairs in topological Josephson junctions
• Andreev reflection in two-dimensional topological insulators with either conserved or broken time-reversal symmetry
• Probing helicity and the topological origins of helicity via non-local Hanbury-Brown and Twiss correlations
• Levitons in helical liquids with Rashba spin-orbit coupling probed by a superconducting contact
• Proximity-induced superconductivity within the InAs/GaSb edge conducting state
• Anisotropic Quantum Spin Hall Effect, Spin-Orbital Textures and Mott Transition
• $\pi$ Spin Berry Phase in a Quantum-Spin-Hall-Insulator-Based Interferometer: Evidence for the Helical Spin Texture of the Edge States
• Transport through quantum spin Hall insulator/metal junctions in graphene ribbons
• Entanglement witnessing in superconducting beamsplitters
• Localized Andreev edge states in HgTe quantum wells
• Josephson junction on one edge of a two dimensional topological insulator affected by magnetic impurity
• Conductance oscillations and zero-bias anomaly in a single superconducting junction to a three-dimensional $B{i}_{2}T{e}_3$ topological insulator
• Conductance oscillations at the interface between a superconductor and the helical edge channel in a narrow HgTe quantum well
• Crossed Andreev reflection in topological insulator nanowire T-junctions
• Parity dependent Josephson current through a helical Luttinger liquid
• Fraunhofer pattern in the presence of Majorana zero modes
• Nonlocality of Majorana bound states revealed by electron waiting times in a topological Andreev interferometer
• Identifying Majorana bound states at quantum spin Hall edges using a metallic probe
• Electron transport in a ferromagnetic/normal/ferromagnetic tunnel junction based on the surface of a topological insulator
• Superconducting quantum spin-Hall systems with giant orbital g-factors
• Interaction effects in superconductor/quantum spin Hall devices: universal transport signatures and fractional Coulomb blockade
• Transport signatures of a quantum spin Hall - chiral topological superconductor junction
• Nonequilibrium Spectroscopy of Topological Edge Liquids
• Bulk transport through superconducting hybrid structures in HgTe quantum wells
• Coalescence of Andreev bound states on the surface of a chiral topological semimetal
• Probing the topological protection of edge states in multilayer tungsten ditelluride with the superconducting proximity effect