Spin polarization of the quantum spin Hall edge states

Abstract

While the helical character of the edge channels responsible for charge transport in the quantum spin Hall regime of a two-dimensional topological insulator is by now well established, an experimental confirmation that the transport in the edge channels is spin-polarized is still outstanding. We report experiments on nanostructures fabricated from HgTe quantum wells with an inverted band structure, in which a split gate technique allows us to combine both quantum spin Hall and metallic spin Hall transport in a single device. In these devices, the quantum spin Hall effect can be used as a spin current injector and detector for the metallic spin Hall effect, and vice versa, allowing for an all-electrical detection of spin polarization.

version 2: supplementary material with additional three figures added. In total 27 pages, 8 figures

References in corpus (10)

• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Dissipationless Quantum Spin Current at Room Temperature
• Direct electronic measurement of the spin Hall effect
• Nonlocal edge state transport in the quantum spin Hall state
• The Quantum Spin Hall Effect: Theory and Experiment
• The Helical Liquid and the Edge of Quantum Spin Hall Systems
• Finite size effects of helical edge states in HgTe/CdTe quantum wells
• Semiclassical theories of the anomalous Hall effect
• Kondo effect in the helical edge liquid of the quantum spin Hall state

Cited by in corpus (189)

• Quantum Spin Hall Effect and Topological Field Effect Transistor in Two-Dimensional Transition Metal Dichalcogenides
• Topological Insulator Materials
• Colloquium: Topological Band Theory
• First-principles calculations of charge carrier mobility and conductivity in bulk semiconductors and two-dimensional materials
• Gapless Andreev bound states in the quantum spin Hall insulator HgTe
• Imaging currents in HgTe quantum wells in the quantum spin Hall regime
• Quantum transport in Rashba spin-orbit materials: A review
• Correlation effects in two-dimensional topological insulators
• Giant topological insulator gap in graphene with 5d adatoms
• Electron quantum optics in ballistic chiral conductors
• Observation of inverse spin Hall effect in bismuth selenide
• Imaging Quantum Spin Hall Edges in Monolayer WTe2
• Elemental Topological Insulator with a Tunable Fermi Level: Strained α-Sn on InSb(001)
• Sub-nm wide electron channels protected by topology
• Unexpected edge conduction in HgTe quantum wells under broken time reversal symmetry
• Spatially resolved study of backscattering in the quantum spin Hall state
• Odd-frequency superconducting pairing in one-dimensional systems
• Spin-helical transport in normal and superconducting topological insulators
• Interacting topological edge channels
• Odd-Frequency Triplet Superconductivity at the Helical Edge of a Toplogical Insulator
• Magnetic properties of HgTe quantum wells
• Photogalvanic probing of helical edge channels in 2D HgTe topological insulators
• Atomically Thin Quantum Spin Hall Insulators
• Strain Engineering of the Band Gap of HgTe Quantum Wells using Superlattice Virtual Substrates
• Temperature-induced topological phase transition in HgTe quantum wells
• Backscattering Between Helical Edge States via Dynamic Nuclear Polarization
• Spin-polarized current induced by a local exchange field in a silicene nanoribbon
• Helical edge states coupled to a spin bath: Current-induced magnetization
• Proposal for an all-electrical measurement of crossed Andreev reflection in topological insulators
• Magnetic field induced localization in 2D topological insulators
• Nonlocal Thermoelectricity in a S-TI-S Junction in Contact with a N-Metal Probe: Evidence for Helical Edge States
• Nonlocal resistance and its fluctuations in microstructures of band-inverted HgTe/(Hg,Cd)Te quantum wells
• Evidence for a quantum-spin-Hall phase in graphene decorated with Bi2Te3 nanoparticles
• Kondo lattice on the edge of a two-dimensional topological insulator
• Photoninduced Weyl half-metal phase and spin filter effect from topological Dirac semimetals
• Quantum Spin Hall Effect in IV-VI Topological Crystalline Insulators
• Edge transport in InAs and InAs/GaSb quantum wells
• Testing Topological Protection of Edge States in Hexagonal Quantum Spin Hall Candidate Materials
• Tunable hybridization of Majorana bound states at the quantum spin Hall edge
• Helical Liquids in Semiconductors
• Spin-thermoelectric transport induced by interactions and spin-flip processes in two dimensional topological insulators
• Artificial Intelligence for High-Throughput Discovery of Topological Insulators: the Example of Alloyed Tetradymites
• Realistic picture of helical edge states in HgTe quantum wells
• Experimental Signatures of the Inverted Phase in InAs/GaSb Coupled Quantum Wells
• Hyperfine interactions in two-dimensional HgTe topological insulators
• Single-edge transport in an InAs/GaSb quantum spin Hall insulator
• Temperature-driven transition from a semiconductor to a topological insulator
• Crafting zero-bias one-way transport of charge and spin
• Magnetic field induced Fabry-Pérot resonances in helical edge states
• Anisotropic quantum quench in the presence of frustration or background gauge fields: A probe of bulk currents and topological chiral edge modes
• Laser-beam patterned topological insulating states on thin semiconducting MoS2
• Nonlinear spin-thermoelectric transport in two-dimensional topological insulators
• Spin-dependent thermoelectric transport in HgTe/CdTe quantum wells
• Robust Helical Edge Transport in Quantum Spin Hall Quantum Wells
• Unconventional spin texture in a non-centrosymmetric quantum spin Hall insulator
• Tunnel junction of helical edge states: Determining and controlling spin-preserving and spin-flipping processes through transconductance
• Design principles for HgTe based topological insulator devices
• Topological protection brought to light by the time-reversal symmetry breaking
• Probing topological transitions in HgTe/CdTe quantum wells by magneto-optical measurements
• Landau Level Spectroscopy of Dirac Electrons in a Polar Semiconductor with Giant Rashba Spin Splitting
• Generic helical edge states due to Rashba spin-orbit coupling in a topological insulator
• Temperature-dependent magnetospectroscopy of HgTe quantum wells
• Helical edge transport in the presence of a magnetic impurity
• Photoexcitation of electron wave packets in quantum spin Hall edge states: effects of chiral anomaly from a localised electric pulse
• Direct observation of topological surface state in the topological superconductor 2M-WS2
• Progress in epitaxial thin-film Na3Bi as a topological electronic material
• Optimal thermoelectricity with quantum spin-Hall edge states
• Topological phases of topological insulator thin films
• Dynamical separation of bulk and edge transport in HgTe-based 2D topological insulators
• Phase-tunable thermal rectification in the topological SQUIPT
• Ab initio study of topological surface states of strained HgTe
• On-demand thermoelectric generation of equal-spin Cooper pairs
• Z2 peak of noise correlations in a quantum spin Hall insulator
• High-temperature quantum Hall effect in finite gapped HgTe quantum wells
• Josephson supercurrent in a topological insulator without a bulk shunt
• Transport discovery of emerging robust helical surface states in $Z_2=0$ systems
• Spin-orbit interactions in a helical Luttinger liquid with a Kondo impurity
• Pure spin current devices based on ferromagnetic topological insulators
• Spin Transfer Torque and Electric Current in Helical Edge States in Quantum Spin Hall Devices
• Spin textures of strongly correlated spin Hall quantum dots
• Current-induced gap opening in interacting topological insulator surfaces
• Persistence of spin edge currents in disordered quantum spin Hall systems
• Helical edge transport in the presence of a magnetic impurity: the role of local anisotropy
• Tunneling magnetoresistance devices based on topological insulators: Ferromagnet/insulator/topological-insulator junctions employing Bi${}_2$Se${}_3$
• Finite Size Effects of the Surface States in a Lattice Model of Topological Insulator
• Nonlocal thermoelectric engines in hybrid topological Josephson junctions
• Evidence on the macroscopic length scale spin coherence for the edge currents in a narrow HgTe quantum well
• Noise and current correlations in tunnel junctions of Quantum Spin Hall edge states
• Spin-orbit interaction in InAs/GaSb heterostructures quantified by weak antilocalization
• Room-temperature quantum spin Hall phase in laser-patterned few-layer 1T'- MoS2
• Probing helicity and the topological origins of helicity via non-local Hanbury-Brown and Twiss correlations
• Nonlocal Edge State Transport in Topological Insulators
• Levitons in helical liquids with Rashba spin-orbit coupling probed by a superconducting contact
• A Topological SQUIPT based on helical edge states in proximity to superconductors
• Floquet engineering of topological phase transitions in quantum spin Hall $\alpha$-$T_3$ system
• Anisotropic Quantum Spin Hall Effect, Spin-Orbital Textures and Mott Transition
• Probing topological phases in a perturbed Kane-Mele model via RKKY interaction: Application to monolayer jacutingaite Pt${}_2$HgSe${}_3$
• $\pi$ Spin Berry Phase in a Quantum-Spin-Hall-Insulator-Based Interferometer: Evidence for the Helical Spin Texture of the Edge States
• Thermal signature of Majorana fermions in Josephson junction
• An all electron topological insulator in InAs double wells
• Non-Hermitian topological phase transitions for quantum spin Hall insulators
• Noiseless manipulation of helical edge state transport by a quantum magnet
• Spin-orbit interaction in Pt or Bi2Te3 nanoparticle-decorated graphene realized by a nanoneedle method
• A gate-tunable quantum phase transition in a topological excitonic insulator
• Universal Quantization of Magnetic Susceptibility Jump at Topological Phase Transition
• Large Chern Number Topological Superfluids in Coupled Layer System
• Coherent spin transport through helical edge states of topological insulator
• Microwave studies of the fractional Josephson effect in HgTe-based Josephson junctions
• Using Topological Insulator Proximity to Generate Perfectly Conducting Channels in Materials without Topological Protection
• Controlling spin polarization of a quantum dot via a helical edge state
• Living on the edge: Topology, electrostatics and disorder
• Interplay between Rashba interaction and electromagnetic field in the edge states of a 2D topological insulator
• Proposal for an ac spin current source
• Fragility of non-local edge mode transport in the quantum spin Hall state
• Breakdown of topological protection due to non-magnetic edge disorder in two-dimensional materials in the Quantum Spin Hall phase
• All-electric spin transistor based on a side-gate-modulated two-dimensional topological insulator
• Effects of disorder on electron tunneling through helical edge states
• Finite frequency backscattering current noise at a helical edge
• Abundance of second order topology in $C_3$ symmetric two-dimensional insulators
• Correlation between topological band character and chemical bonding in a $\mathbf{B}{\mathbf{i}}_{14}\mathbf{R}{\mathbf{h}}_3{\mathbf{I}}_9$-based family of insulators
• Many-particle effects in optical transitions from zero-mode Landau levels in HgTe quantum wells
• Quantized spin pumping in topological ferromagnetic-superconducting nanowires
• Moving Majorana bound states between distinct helical edges across a quantum point contact
• Interaction induced edge states in HgTe/CdTe Quantum Well under magnetic field
• Two-Dimensional Time-Reversal-Invariant Topological Insulators via Fredholm Theory
• Protection of Edge transport in Quantum Spin Hall samples: Spin-Symmetry Based General Approach and Examples
• Photoexcitation in two-dimensional topological insulators: Generating and controlling electron wavepackets in Quantum Spin Hall systems
• Analytical and Numerical study of the out-of-equilibrium current through a helical edge coupled to a magnetic impurity
• Tunneling Aharonov-Bohm interferometer on helical edge states
• Dynamic Opening of a Gap in Dirac Surface States of the Thin-Film 3D Topological Insulator Bi2Se3 Driven by the Dynamic Rashba Effect
• Supercurrent mediated by helical edge modes in bilayer graphene
• Explicit derivation of the chiral and (generic) helical edge states for the Kane-Mele model: Closed expressions for the wave function, dispersion relation, and spin rotation
• Spin and charge transport through helical Aharonov-Bohm interferometer with strong magnetic impurity
• Experimental observation of edge-dependent quantum pseudospin Hall effect
• Interaction-induced crossover between weak anti-localization and weak localization in a disordered InAs/GaSb double quantum well
• Velocity and confinement of edge plasmons in HgTe-based 2D topological insulators
• Revealing the topological phase diagram of ZrTe${}_5$ using the complex strain fields of microbubbles
• Current-induced switching of magnetic molecules on topological insulator surfaces
• Quantum capacitance of an HgTe quantum well as an indicator of the topological phase
• Topological contribution to magnetism in the Kane-Mele model: An explicit wave function approach
• Robustness of Helical Edge States Under Edge Reconstruction
• Nonlocality of Majorana bound states revealed by electron waiting times in a topological Andreev interferometer
• Anomalous Spin Response and Virtual-Carrier-Mediated Magnetism in a Topological Insulator
• Quantum spin Hall effect in III-V semiconductors at elevated temperatures: advancing topological electronics
• Nonlinear planar magnetotransport due to tilted Dirac cones in topological materials
• Characterization of helical Luttinger liquids in microwave stepped-impedance edge resonators
• Chemical Gating of a Weak Topological Insulator: Bi14Rh3I9
• Nonlocal transport in a hybrid two-dimensional topological insulator
• Edge spin transport in the disordered two-dimensional topological insulator WTe${}_2$
• Tunable polarization in beam-splitter based on 2D topological insulators
• Multiprobe quantum spin Hall bars
• Electron interferometry and quantum spin Hall phase in silicene
• Identifying Majorana bound states at quantum spin Hall edges using a metallic probe
• Spin current in an electron waveguide tunnel-coupled to topological insulator
• Superconducting quantum spin-Hall systems with giant orbital g-factors
• Tunable helical crystals
• Asymmetric versus symmetric $HgTe/C{\mathrm{d}}_{\mathrm{x}}\mathrm{H}{\mathrm{g}}_{1-\mathrm{x}}\mathrm{Te}$ double quantum wells: Band gap tuning without electric field
• Tunable multi-electron Pancharatnam phase in intensity interferometry
• Chiral detection of Majorana bound states at the edge of a quantum spin Hall insulator
• Optical effects of spin currents in semiconductors
• Adiabatic charge transport in extended SSH models
• Spin-resolved spectroscopy of helical Andreev bound states
• Spin-polarized voltage probes for helical edge state: a model study
• Phase-tunable multiple Andreev reflections in a quantum spin Hall strip
• One-Dimensional Spin-Polarised Surface States -- A Comparison of Bi(112) with Other Vicinal Bismuth Surfaces
• Optical N-plasmon: Topological hydrodynamic excitations in Graphene from repulsive Hall viscosity
• Evidence of magnetoelectronic electromagnon mediated transport in flexoelectronic heterostructures
• Interference effects induced by a precessing easy-plane magnet coupled to a helical edge state
• Robust qubit interactions mediated by photonic topological edge states
• Spin-Hall conductivity and optical characteristics of noncentrosymmetric quantum spin Hall insulators: the case of PbBiI
• Time dependent electric transport in nodal-loop semimetals
• Effective Hamiltonian of topologically protected qubit in a helical crystal
• Spin injection from topological insulator tunnel-coupled to metallic leads
• Thermal dissipation of the quantum spin Hall edge states in HgTe/CdTe quantum well
• Anomalous Hall Response in Two Dimensional Topological Insulators due to the Stark Effect
• Enhanced Thermoelectricity in Nanowires with inhomogeneous Helical states
• On the accuracy of conductance quantization in spin-Hall insulators
• Gate control of spin-polarized conductance in alloyed transition metal nano-contacts
• Determination of Out-of-plane Spin Polarization of Topological Surface States by Spin Hall Effect Tunneling Spectroscopy
• Spin transport and lack of quantisation for time-reversal symmetric insulators on the honeycomb structure
• Torsional Hall Viscosity of Massive Chern Insulators: Magnetic Field and Momentum Deformations
• Crystalline Weyl semimetal phase in Quantum Spin Hall systems under magnetic fields
• Localization and entanglement characterization of edge states in HgTe quantum wells in a finite strip geometry
• Edge Reconstruction in a Quantum Spin Hall Insulator
• Disordered contacts can localize helical edge electrons
• Identification of odd-frequency superconducting pairing in Josephson junctions
• Interlayer charge transfer from contact electrification in conducting micro and nanoscale thin film heterostructures
• Giant magnetoresistance of edge current between fermion and spin topological systems
• Many-particle hybridization of optical transitions from zero-mode Landau levels in HgTe quantum wells