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This paper shows that a substantial amount of dissipationless
spin-Hall current contribution may exist in the extrinsic spin-Hall
effect, which originates from the spin-orbit coupling induced by
the applied external electric field itself that drives the extrinsic
spin-Hall effect in a nonmagnetic semiconductor (or metal). By
assuming that the impurity density is in a moderate range such that
the total scattering potential due to all randomly distributed
impurities is a smooth function of the space coordinate, it is shown
that this dissipationless contribution shall be of the same orders
of magnitude as the usual extrinsic contribution from spin-orbit
dependent impurity scatterings (or may even be larger than the
latter one). The theoretical results obtained are in good agreement
with recent relevant experimental results. 相似文献
2.
Influence of spin-orbit coupling induced by in-plane external electric field on the intrinsic spin-Hall effect in a Rashba two-dimensional electron gas 下载免费PDF全文
We study theoretically the influence of spin--orbit
coupling induced by in-plane external electric field on the
intrinsic spin-Hall effect in a two-dimensional electron gas with
Rashba spin--orbit coupling. We show that, after such an influence is
taken into account, the static intrinsic spin-Hall effect can be
stabilized in a disordered Rashba two-dimensional electron gas, and
the static intrinsic spin-Hall conductivity shall exhibit some
interesting characteristics as conceived in some original
theoretical proposals. 相似文献
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