Spin freezing by Anderson localization in one-dimensional semiconductors

Details Spin freezing by Anderson localization in one-dimensional semiconductors Spin freezing by Anderson localization in one-dimensional semiconductors

2012-04-25

arxiv.org/abs/1204.5597v1

Phys. Rev. B 85, 085430 (2012)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

One-dimensional quantum wires are considered as prospective elements for spin transport and manipulation in spintronics. We study spin dynamics in semiconductor GaAs-like nanowires with disorder and spin-orbit interaction by using a rotation in the spin subspace gauging away the spin-orbit field. If the disorder is sufficiently strong, the spin density after a relatively short relaxation time reaches a plateau. This effect is a manifestation of the Anderson localization and depends in a universal way on the disorder and the spin-orbit coupling strength. As a result, at a given disorder, semiconductor nanowires can permit a long-term spin polarization tunable with the spin-orbit interactions.

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