Mesoscopic fluctuations in the spin-electric susceptibility due to Rashba spin-orbit interaction

Details Mesoscopic fluctuations in the spin-electric susceptibility due to Rashba spin-orbit interaction Mesoscopic fluctuations in the spin-electric susceptibility due to Rashba spin-orbit interaction

2008-05-27

arxiv.org/abs/0805.4143v1

Phys. Rev. Lett. 101, 226602 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.101.226602

We investigate mesoscopic fluctuations in the spin polarization generated by a static electric field and by Rashba spin-orbit interaction in a disordered 2D electron gas. In a diagrammatic approach we find that the out-of-plane polarization -- while being zero for self-averaging systems -- exhibits large sample-to-sample fluctuations which are shown to be well within experimental reach. We evaluate the disorder-averaged variance of the susceptibility and find its dependence on magnetic field, spin-orbit interaction, dephasing, and chemical potential difference.

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