Nonexistence of intrinsic spin currents

Details Nonexistence of intrinsic spin currents Nonexistence of intrinsic spin currents

2004-08-06

arxiv.org/abs/cond-mat/0408136v1

PRL 96, p. 056602 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, RevTex, 1 Fig

Scientific paper

We have described the electron spin dynamics in the presence of the spin-orbit interaction and disorder using the spin-density matrix method. We showed that in the Born approximation in the scattering amplitude the spin current is zero for an arbitrary ratio of the spin-orbit splitting and the scattering rate. Various types of the disorder potential are studied. We argue that the bulk spin current has always an {\it extrinsic} nature and depends explicitely on scattering by impurities since it appears only beyond the Born approximation in the scattering amplitude.

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