Resonant spin polarization and spin current in a two-dimensional electron gas

Details Resonant spin polarization and spin current in a two-dimensional electron gas Resonant spin polarization and spin current in a two-dimensional electron gas

2007-01-23

arxiv.org/abs/cond-mat/0701559v2

Phys. Rev. B 75, 201305(R) (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

(5 pages), updated references, corrected typos

Scientific paper

10.1103/PhysRevB.75.201305

We study the spin polarization and its associated spin-Hall current due to EDSR in disordered two-dimensional electron systems. We show that the disorder induced damping of the resonant spin polarization can be strongly reduced by an optimal field configuration that exploits the interference between Rashba and Dresselhaus spin-orbit interaction. This leads to a striking enhancement of the spin susceptibility while the spin-Hall current vanishes at the same time. We give an interpretation of the spin current in geometrical terms which are associated with the trajectories the polarization describes in spin space.

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