On A Proper Definition of Spin Current

Details On A Proper Definition of Spin Current On A Proper Definition of Spin Current

2005-03-20

arxiv.org/abs/cond-mat/0503505v5

Phys. Rev. Lett. 96, 076604 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Final version with updated journal-ref

Scientific paper

10.1103/PhysRevLett.96.076604

The conventional definition of spin current is incomplete and unphysical in describing spin transport in systems with spin-orbit coupling. A proper and measurable spin current is established in this study, which fits well into the standard framework of near-equilibrium transport theory and has the desirable property to vanish in insulators with localized orbitals. Experimental implications of our theory are discussed.

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