Spin-polarized transport in a lateral two-dimensional diluted magnetic semiconductor electron gas

Details Spin-polarized transport in a lateral two-dimensional diluted magnetic semiconductor electron gas Spin-polarized transport in a lateral two-dimensional diluted magnetic semiconductor electron gas

2005-09-23

arxiv.org/abs/cond-mat/0509591v1

Appl. Phys. Lett. 88, 082107 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages, 3 figures, submitted to Appl. Phys. Lett

Scientific paper

10.1063/1.2177373

The transport property of a lateral two-dimensional diluted magnetic semiconductor electron gas under a spatially periodic magnetic field is investigated theoretically. We find that the electron Fermi velocity along the modulation direction is highly spin-dependent even if the spin polarization of the carrier population is negligibly small. It turns out that this spin-polarized Fermi velocity alone can lead to a strong spin polarization of the current, which is still robust against the energy broadening effect induced by the impurity scattering.

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