Semiclassical Boltzmann theory of spin Hall effects in giant Rashba systems
arXiv:1705.09399 · doi:10.1007/s11467-017-0720-8
Abstract
For the spin Hall effect arising from strong band-structure spin-orbit coupling, a semiclassical Boltzmann theory reasonably addressing the intriguing disorder effect called side-jump is still absent. In this paper we describe such a theory of which the key ingredient is the spin-current-counterpart of the semiclassical side-jump velocity (introduced in the context of the anomalous Hall effect). Applying this theory to spin Hall effects in a two-dimensional electron gas with giant Rashba spin-orbit coupling, we find largely enhanced spin Hall angle in the presence of magnetic impurities when only the lower Rashba band is partially occupied.
6 pages, 1 figure, some more discussions added in this version, accepted by Frontiers of Physics
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