Extrinsic spin Hall effect in inhomogeneous systems
arXiv:1912.12077 · doi:10.1103/PhysRevB.102.094426
Abstract
Charge-to-spin conversion in inhomogeneous systems is studied theoretically. We consider free electrons subject to impurities with spin-orbit interaction and with spatially modulated distribution, and calculate spin accumulation and spin current induced by an external electric field. It is found that the spin accumulation is induced by the vorticity of electron flow through the side-jump and skew-scattering processes, and the differences of the two processes are discussed. The results can be put in a form of generalized spin diffusion equation with a spin source term given by the divergence of the spin Hall current. This spin source term reduces to the form of spin-vorticity coupling when the spin Hall angle is independent of impurity concentration. We also study the effects of long-range Coulomb interaction, which is indispensable when the process involves charge inhomogeneity and accumulation as in the present problem.
21 pages, 19 figures
References in corpus (18)
- Universal Intrinsic Spin-Hall Effect
- Dissipationless Quantum Spin Current at Room Temperature
- Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems
- Direct electronic measurement of the spin Hall effect
- Experimental observation of the spin-Hall effect in a two dimensional spin-orbit coupled semiconductor system
- Nonlocal magnetization dynamics in ferromagnetic heterostructures
- Unidirectional spin Hall magnetoresistance in ferromagnet/normal metal bilayers
- Theory of Spin Hall conductivity in n-doped GaAs
- Mechanical generation of spin current by spin-rotation coupling
- Spin Hall Effect in Doped Semiconductor Structures
- Origins of the unidirectional spin Hall magnetoresistance in metallic bilayers
- Theory of unidirectional spin Hall magnetoresistance in heavy-metal/ferromagnetic-metal bilayers
- Theory of spin hydrodynamic generation
- Spin Accumulation in the Extrinsic Spin Hall Effect
- Anomalous Hall effect in 2D Rashba ferromagnet
- Tuning the Spin Hall Effect in a Two-Dimensional Electron Gas
- Effect of spin rotation coupling on spin transport
- Generation of Spin Current from Lattice Distortion Dynamics: Spin-Orbit Routes