Nonlinear spin-thermoelectric transport in two-dimensional topological insulators
arXiv:1406.3187 · doi:10.1103/PhysRevB.90.115301
Abstract
We consider spin-polarized transport in a quantum spin Hall antidot system coupled to normal leads. Due to the helical nature of the conducting edge states, the screening potential at the dot region becomes spin dependent without external magnetic fields nor ferromagnetic contacts. Therefore, the electric current due to voltage or temperature differences becomes spin polarized, its degree of polarization being tuned with the dot level position or the base temperature. This spin-filter effect arises in the nonlinear transport regime only and has a purely interaction origin. Likewise, we find a spin polarization of the heat current which is asymmetric with respect to the bias direction. Interestingly, our results show that a pure spin current can be generated by thermoelectric means: when a temperature gradient is applied, the created thermovoltage (Seebeck effect) induces a spin-polarized current for vanishingly small charge current. An analogous effect can be observed for the heat transport: a pure spin heat flows in response to a voltage shift even if the thermal current is zero.
arXiv comment10 pages, 7 figures
References in corpus (53)
- Quantum Spin Hall Effect in Graphene
- Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
- Topological Order and the Quantum Spin Hall Effect
- Quantum Spin Hall Insulator State in HgTe Quantum Wells
- Evidence for Helical Edge Modes in Inverted InAs/GaSb Quantum Wells
- Nonlocal edge state transport in the quantum spin Hall state
- Semiconductor Spintronics
- Observation of the Spin-Seebeck Effect in a Ferromagnetic Semiconductor
- Stability of the quantum spin Hall effect: effects of interactions, disorder, and Z_2 topology
- Thermally driven spin injection from a ferromagnet into a non-magnetic metal
- Spin polarization of the quantum spin Hall edge states
- Most efficient quantum thermoelectric at finite power output
- Heat dissipation in atomic-scale junctions
- Cooling and heating with electron spins: Observation of the spin Peltier effect
- Nondissipative Spin Hall Effect via Quantized Edge Transport
- Gauge invariant nonlinear electric transport in mesoscopic conductors
- Topological insulators and thermoelectric materials
- Magnetic-field asymmetry of nonlinear mesoscopic transport
- Scattering theory of nonlinear thermoelectric transport
- Switching spin and charge between edge states in topological insulator constrictions
- Nonlinear thermovoltage and thermocurrent in quantum dots
- Spin and Polarized Current from Coulomb Blockaded Quantum Dots
- Heat dissipation and its relation to thermopower in single-molecule junctions
- Full electrical control of Charge and Spin conductance through Interferometry of Edge States in Topological Insulators
- Spatially resolved study of backscattering in the quantum spin Hall state
- Single-electron heat diode
- Nonlinear heat transport in mesoscopic conductors: Rectification, Peltier effect and Wiedemann-Franz law
- Thermoelectricity by Perfectly Conducting Channels in Quantum Spin Hall Systems
- Proposal for the detection and braiding of Majorana fermions in a quantum spin Hall insulator
- Thermodynamic and quantum bounds on nonlinear DC thermoelectric transport
- Scattering Theory of Nonlinear Thermoelectricity in Quantum Coherent Conductors
- Holey topological thermoelectrics
- Non-linear thermoelectric transport: A class of nano-devices for high efficiency and large power output
- Electrically Controlled Pumping of Spin Currents in Topological Insulators
- Electrical switching and interferometry of massive Dirac particles in topological insulators constrictions
- Transport through a quantum spin Hall quantum dot
- Thermal spin current and magnetothermopower by Seebeck spin tunneling
- The probe technique far-from-equilibrium: Magnetic field symmetries of nonlinear transport
- Generating and controlling spin-polarized currents induced by a quantum spin Hall antidot
- Exact results for the Kondo screening cloud of two helical liquids
- Coherent Oscillations and Giant Edge Magnetoresistance in Singly Connected Topological Insulators
- Spin-dependent thermoelectric transport in HgTe/CdTe quantum wells
- Tunnel junction of helical edge states: Determining and controlling spin-preserving and spin-flipping processes through transconductance
- Fluctuation Relations for Spintronics
- Z2 peak of noise correlations in a quantum spin Hall insulator
- Transport phenomena in helical edge states interferometers. A Green's function approach
- Interaction induced magnetic field asymmetry of nonlinear mesoscopic electrical transport
- Transition between ordinary and topological insulator regimes in two-dimensional resonant magnetotransport
- Spin heat accumulation induced by tunneling from a ferromagnet
- Strongly-Correlated Thermoelectric Transport beyond Linear Response
- Magnetic-field asymmetry of nonlinear thermoelectric and heat transport
- Nonequilibrium transport of helical Luttinger liquids through a quantum dot
- Spin current in an electron waveguide tunnel-coupled to topological insulator
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- Detailed study of nonlinear cooling with two-terminal configurations of topological edge states
- Anomalous Nernst effect on a magnetically-doped topological insulator surface: A Green's function approach
- Emission of entangled Kramers pairs from a helical mesoscopic capacitor
- Transport through a quantum spin Hall antidot as a spectroscopic probe of spin textures
- Thermoelectric cooling properties of a quantum Hall Corbino device
- Transport in quantum spin Hall edges in contact to a quantum dot
- Reaching Van den Broeck limit in linear response and Whitney limit in nonlinear response in edge mode quantum thermoelectrics and refrigeration
- Theory of shift heat current and its application to electron-phonon coupled systems
- Nonlinear heat transport in ferromagnetic-quantum dot-superconducting systems