Intrinsic spin hall effect in the two-dimensional hole gas

B. Andrei Bernevig, Shou Cheng Zhang

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144 Scopus citations

Abstract

We show that two types of spin-orbit coupling in the 2 dimensional holegas, with and without inversion symmetry breaking, contribute to the intrinsicspin-Hall effect. Furthermore, the vertex correction due to impurity scatteringvanishes in both cases, in sharp contrast to the case of usual Rashba couplingin the electron band. Recently, the spin-Hall effect in a hole doped GaAssemiconductor has been observed experimentally by Wunderlich et al. [Phys. Rev. Lett. 94, 047204 (2005).PRLTAO0031-900710.1103/PhysRevLett.94.047204]. From the factthat the lifetime broadening is smaller than the spin splitting, and the factimpurity vertex corrections vanish in this system, we argue that the observedspin-Hall effect should be in the intrinsic regime.

Original languageEnglish (US)
Article number016801
JournalPhysical review letters
Volume95
Issue number1
DOIs
StatePublished - Jul 1 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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