Valley and spin accumulation in ballistic and hydrodynamic channels
arXiv:2110.11124 · doi:10.1088/2053-1583/ac3e04
Abstract
A theory of the valley and spin Hall effects and resulting accumulation of the valley and spin polarization is developed for ultraclean channels made of two-dimensional semiconductors where the electron mean free path due to the residual disorder or phonons exceeds the channel width. Both ballistic and hydrodynamic regimes of the electron transport are studied. The polarization accumulation is determined by interplay of the anomalous velocity, side-jump and skew scattering effects. In the hydrodynamic regime, where the electron-electron scattering is dominant, the valley and spin current generation and dissipation by the electron-electron collisions are taken into account. The accumulated polarization magnitude and its spatial distribution depend strongly on the transport regime. The polarization is much larger in the hydrodynamic regime as compared to the ballistic one. Significant valley and spin polarization arises in the immediate vicinity of the channel edges due to the side-jump and skew scattering mechanisms.
arXiv comment20 pages, 5+1 figures
References in corpus (69)
- Atomically thin MoS2: A new direct-gap semiconductor
- Berry Phase Effects on Electronic Properties
- Coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides
- Anomalous Hall effect
- Control of valley polarization in monolayer MoS2 by optical helicity
- Spin Hall effect
- Universal Intrinsic Spin-Hall Effect
- Excitons in atomically thin transition metal dichalcogenides
- Dissipationless Quantum Spin Current at Room Temperature
- The Valley Hall Effect in MoS2 Transistors
- Experimental observation of the spin-Hall effect in a two dimensional spin-orbit coupled semiconductor system
- k.p theory for two-dimensional transition metal dichalcogenide semiconductors
- Wave-packet dynamics in slowly perturbed crystals: Gradient corrections and Berry-phase effects
- Negative local resistance caused by viscous electron backflow in graphene
- Evidence for hydrodynamic electron flow in PdCoO
- Superballistic flow of viscous electron fluid through graphene constrictions
- Hydrodynamics of electrons in graphene
- Electron Viscosity, Current Vortices and Negative Nonlocal Resistance in Graphene
- Semiclassical theories of the anomalous Hall effect
- Imaging viscous flow of the Dirac fluid in graphene
- Hydrodynamic electron flow in high-mobility wires
- Measuring Hall Viscosity of Graphene's Electron Fluid
- Anomalous Hall effect in 2D Dirac band: link between Kubo-Streda formula and semiclassical Boltzmann equation approach
- Exciton diffusion and halo effects in monolayer semiconductors
- Visualizing Poiseuille flow of hydrodynamic electrons
- Direct measurement of the quantum geometric tensor in a two-dimensional continuous medium
- Non-local transport and the hydrodynamic shear viscosity in graphene
- Observation of spin Coulomb drag in a two-dimensional electron gas
- Lorentz Invariance in Chiral Kinetic Theory
- Hydrodynamic description of transport in strongly correlated electron systems
- Negative magnetoresistance in viscous flow of two-dimensional electrons
- Hydrodynamics in graphene: Linear-response transport
- Non-local transport and the Hall viscosity of 2D hydrodynamic electron liquids
- Optical valley Hall effect for highly valley-coherent exciton-polaritons in an atomically thin semiconductor
- The boundary conditions of viscous electron flow
- Coulomb scattering lifetime of a two-dimensional electron gas
- Hydrodynamic approach to electronic transport in graphene
- Viscous electron flow in mesoscopic two-dimensional electron gas
- Ballistic and shift currents in the bulk photovoltaic effect theory
- Anomalous Hall effect with massive Dirac fermions
- Giant magneto-drag in graphene at charge neutrality
- Berry Phase Effect on Exciton Transport and Bose Einstein Condensate
- Coulomb interaction effects in spin-polarized transport
- Theory of spin hydrodynamic generation
- Spin Coulomb drag in the two-dimensional electron liquid
- Stokes paradox in electronic Fermi liquids
- Microscopic Origin of the Valley Hall Effect in Transition Metal Dichalcogenides Revealed by Wavelength Dependent Mapping
- Viscosity of two-dimensional electrons
- A classical mechanism for negative magnetoresistance in two-dimensional systems in the ballistic regime
- Stokes flow around an obstacle in viscous two-dimensional electron liquid
- Valley Acoustoelectric Effect
- Nonmonotonic magnetoresistance of a two-dimensional viscous electron-hole fluid in a confined geometry
- Relativistic Gurzhi effect in channels of Dirac materials
- Electron hydrodynamics of anomalous Hall materials
- The Hall effect in ballistic flow of two-dimensional interacting particles
- Valley Hall effect caused by the phonon and photon drag
- Spin-orbit effect on electron-electron interaction and fine structure of electron complexes in quantum dots
- Quantum Kinetic Theory of Thermoelectric and Thermal Transport in a Magnetic Field
- Skew Scattering and Side Jump Drive Exciton Valley Hall Effect in Two-Dimensional Crystals
- Spin Hall Drag
- Quantum kinetics of anomalous and nonlinear Hall effects in topological semimetals
- Spin Hall Effect of Excitons
- Spin-vorticity coupling in viscous electron fluids
- Magnetodrag in hydrodynamic regime: effects of magnetoplasmon resonance and Hall viscosity
- Fine structure of two-electron states in single and double quantum dots
- Two-particle collisional coordinate shifts and hydrodynamic anomalous Hall effect in systems without Lorentz invariance
- Vorticity-induced anomalous Hall effect in electron fluid
- Spin current generation from Coulomb-Rashba interaction in semiconductor bilayers
- Quantum Anomalous Valley Hall Effect for Bosons
Cited by in corpus (4)
- Spin and Valley Hall effects induced by asymmetric interparticle scattering
- Spin imaging of Poiseuille flow of viscous electronic fluid
- Rotational viscosity in spin resonance of hydrodynamic electrons
- Electron diffusion induced valley Hall effect and nonlinear galvanodiffusive transport in hexagonal 2D Dirac monolayer materials