Spin dynamics in a compound semiconductor spintronic structure with a Schottky barrier

Details Spin dynamics in a compound semiconductor spintronic structure with a Schottky barrier Spin dynamics in a compound semiconductor spintronic structure with a Schottky barrier

2005-12-16

arxiv.org/abs/cond-mat/0512414v1

J. Phys.: Condens. Matter 18 1535-1544 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

15 pages, 5 figures, accepted for publication in J. Phys.: Condens. Matter

Scientific paper

10.1088/0953-8984/18/5/005

We demonstrate theoretically that spin dynamics of electrons injected into a GaAs semiconductor structure through a Schottky barrier possesses strong non-equilibrium features. Electrons injected are redistributed quickly among several valleys. Spin relaxation driven by the spin-orbital coupling in the semiconductor is very rapid. At T = 4.2 K, injected spin polarization decays on a distance of the order of 50 - 100 nm from the interface. This spin penetration depth reduces approximately by half at room temperature. The spin scattering length is different for different valleys.

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