Spin transport theory in ferromagnet/semiconductor systems with non-collinear magnetization configurations

Details Spin transport theory in ferromagnet/semiconductor systems with non-collinear magnetization configurations Spin transport theory in ferromagnet/semiconductor systems with non-collinear magnetization configurations

2009-10-27

arxiv.org/abs/0910.5012v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

17 pages, 10 figures

Scientific paper

We present a comprehensive theory of spin transport in a non-degenerate semiconductor that is in contact with multiple ferromagnetic terminals. The spin dynamics in the semiconductor is studied during a perturbation of a general, non-collinear magnetization configuration and a method is shown to identify the various configurations from current signals. The conventional Landauer-B\"{u}ttiker description for spin transport across Schottky contacts is generalized by the use of a non-linearized I-V relation, and it is extended by taking into account non-coherent transport mechanisms. The theory is used to analyze a three terminal lateral structure where a significant difference in the spin accumulation profile is found when comparing the results of this model with the conventional model.

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