Nonexistence of intrinsic spin currents

Abstract

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.

5 pages, RevTex, 1 Fig

References in corpus (6)

• Dissipationless Quantum Spin Current at Room Temperature
• Experimental observation of the spin-Hall effect in a two dimensional spin-orbit coupled semiconductor system
• Spin current and polarization in impure 2D electron systems with spin-orbit coupling
• Absence of vertex correction for the spin Hall effect in p-type semiconductors
• Dissipation effects in spin-Hall transport of electrons and holes
• Dependence of the intrinsic spin Hall effect on spin-orbit interaction character

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