Topological spin-Hall current in waveguided zinc-blende semiconductors with Dresselhaus spin-orbit coupling

Details Topological spin-Hall current in waveguided zinc-blende semiconductors with Dresselhaus spin-orbit coupling Topological spin-Hall current in waveguided zinc-blende semiconductors with Dresselhaus spin-orbit coupling

2007-09-05

arxiv.org/abs/0709.0609v2

Ann. Phys. 324, 2265 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 3 figures

Scientific paper

10.1016/j.aop.2009.08.007

We describe an intrinsic spin-Hall effect in $n$-type bulk zinc-blende semiconductors with topological origin. When electron transport is confined to a waveguide structure, and the applied electric field is such that the spins of electrons remain as eigenstates of the Dresselhaus spin-orbit field with negligible subband mixing, a gauge structure appears in the momentum space of the system. In particular, the momentum space exhibits a non-trivial Berry curvature which affects the transverse motion of electrons anisotropically in spin, thereby producing a finite spin-Hall effect. The effect should be detectable using standard techniques in the literature such as Kerr rotation, and be readily distinguishable from other mechanisms of the spin-Hall effect.

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