Spin accumulation and decay in magnetic Schottky barriers

Details Spin accumulation and decay in magnetic Schottky barriers Spin accumulation and decay in magnetic Schottky barriers

2005-01-29

arxiv.org/abs/cond-mat/0501726v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.72.155304

The theory of charge and spin transport in forward-biased Schottky barriers reveals characteristic and experimentally relevant features. The conductance mismatch is found to enhance the current induced spin-imbalance in the semiconductor. The GaAs|MnAs interface resistance is obtained from an analysis of the magnetic field dependent Kerr rotation experiments by Stephens et al. and compared with first-principles calculations for intrinsic interfaces. With increasing current bias, the interface transparency grows towards the theoretical values, reflecting increasingly efficient Schottky barrier screening.

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