Co-ordination between Rashba spin-orbital interaction and space charge effect and enhanced spin injection into semiconductors

Details Co-ordination between Rashba spin-orbital interaction and space charge effect and enhanced spin injection into semiconductors Co-ordination between Rashba spin-orbital interaction and space charge effect and enhanced spin injection into semiconductors

2003-04-04

arxiv.org/abs/cond-mat/0304117v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures

Scientific paper

10.1088/0953-8984/16/1/012

We consider the effect of the Rashba spin-orbital interaction and space charge in a ferromagnet-insulator/semiconductor/insulator-ferromagnet junction where the spin current is severely affected by the doping, band structure and charge screening in the semiconductor. In diffusion region, if the the resistance of the tunneling barriers is comparable to the semiconductor resistance, the magnetoresistance of this junction can be greatly enhanced under appropriate doping by the co-ordination between the Rashba effect and screened Coulomb interaction in the nonequilibrium transport processes within Hartree approximation.

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