Spin current in spin-orbit coupling systems

Jiangping Hu, Bogdan A. Bernevig, Congjun Wu

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

We present a simple and pedagogical derivation of the spin current as the linear response to an external electric field for both Rashba and Luttinger spin-orbital coupling Hamiltonians. Except for the adiabatic approximation, our derivation is exact to the linear order of the electric field for both models. The spin current is a direct result of the difference in occupation levels between different bands. Moreover, we show a general topological spin current can be defined for a broad class of spin-orbit coupling systems.

Original languageEnglish (US)
Pages (from-to)5991-6000
Number of pages10
JournalInternational Journal of Modern Physics B
Volume17
Issue number31-32
DOIs
StatePublished - Dec 30 2004

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Condensed Matter Physics

Keywords

  • Adiabatic approximation
  • Spin current
  • Spin-orbital coupling

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