Spin magnetotransport in two-dimensional hole systems

Details Spin magnetotransport in two-dimensional hole systems Spin magnetotransport in two-dimensional hole systems

2007-06-17

arxiv.org/abs/0706.2468v1

Phys. Rev. B 75, 233303 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures, published in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.75.233303

Spin current of two-dimensional holes occupying the ground-state subband in an asymmetric quantum well and interacting with static disorder potential is calculated in the presence of a weak magnetic field H perpendicular to the well plane. Both spin-orbit coupling and Zeeman coupling are taken into account. It is shown that the applied electric field excites both the transverse (spin-Hall) and diagonal spin currents, the latter changes its sign at a finite H and becomes greater than the spin-Hall current as H increases. The effective spin-Hall conductivity introduced to describe the spin response in Hall bars is considerably enhanced by the magnetic field in the case of weak disorder and demonstrates a non-monotonic dependence on H.

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