Intrinsic Spin Hall Effect in the Two Dimensional Hole Gas

Details Intrinsic Spin Hall Effect in the Two Dimensional Hole Gas Intrinsic Spin Hall Effect in the Two Dimensional Hole Gas

2004-11-18

arxiv.org/abs/cond-mat/0411457v3

Phys. Rev. Lett. 95, 016801 (2005)

Physics

Condensed Matter

Other Condensed Matter

Minor typos fixed, one reference added

Scientific paper

10.1103/PhysRevLett.95.016801

We show that two types of spin-orbit coupling in the 2 dimensional hole gas (2DHG), with and without inversion symmetry breaking, contribute to the intrinsic spin Hall effect\cite{murakami2003,sinova2003}. Furthermore, the vertex correction due to impurity scattering vanishes in both cases, in sharp contrast to the case of usual Rashba coupling in the electron band. Recently, the spin Hall effect in a hole doped $GaAs$ semiconductor has been observed experimentally by Wunderlich \emph{et al}\cite{wunderlich2004}. From the fact that the life time broadening is smaller than the spin splitting, and the fact impurity vertex corrections vanish in this system, we argue that the observed spin Hall effect should be in the intrinsic regime.

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