Non-Equilibrium Transport Through a Gate-Controlled Barrier on the Quantum Spin Hall Edge

Abstract

The Quantum Spin Hall insulator is characterized by the presence of gapless helical edge states where the spin of the charge carriers is locked to their direction of motion. In order to probe the properties of the edge modes, we propose a design of a tunable quantum impurity realized by a local gate under an external magnetic field. Using the integrability of the impurity model, the conductance is computed for arbitrary interactions, temperatures and voltages, including the effect of Fermi liquid leads. The result can be used to infer the strength of interactions from transport experiments

6 pages (including supplementary material), 3 figures

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Cited by in corpus (19)

• Interplay of exciton condensation and quantum spin Hall effect in InAs/GaSb bilayers
• Spatially resolved study of backscattering in the quantum spin Hall state
• Proposal for the detection and braiding of Majorana fermions in a quantum spin Hall insulator
• Effects of nuclear spins on the transport properties of the edge of two-dimensional topological insulators
• Imaging gate-tunable Tomonaga-Luttinger liquids in 1H-MoSe${}_2$ mirror twin boundaries
• Testing Topological Protection of Edge States in Hexagonal Quantum Spin Hall Candidate Materials
• Helical Liquids in Semiconductors
• Coulomb blockade microscopy of spin density oscillations and fractional charge in quantum spin Hall dots
• Persistent currents in Dirac fermion rings
• Spin textures of strongly correlated spin Hall quantum dots
• Transport Across an Impurity in One Dimensional Quantum Liquids Far From Equilibrium
• All-electric spin transistor based on a side-gate-modulated two-dimensional topological insulator
• Edge Physics of the Quantum Spin Hall Insulator from a Quantum Dot Excited by Optical Absorption
• Confining electrons on a topological insulator surface using potentials and a magnetic field
• Jackiw-Rebbi zero modes in non-uniform topological insulator nanowire
• Spin Berry phase in a helical edge state: Sz nonconservation and transport signatures
• Absence of Perfect Conductance Quantization of Helical-edge Transport in Graphene under a Strong, Tilted Magnetic Field
• Nonequilibrium Spectroscopy of Topological Edge Liquids
• Topological p-n junctions in helical edge states