Spin diffusion in doped semiconductors: the role of Coulomb interactions

Details Spin diffusion in doped semiconductors: the role of Coulomb interactions Spin diffusion in doped semiconductors: the role of Coulomb interactions

2000-07-11

arxiv.org/abs/cond-mat/0007197v4

Physics

Condensed Matter

Strongly Correlated Electrons

Changes in figures; accepted for publication by Europhysics Letters

Scientific paper

10.1209/epl/i2001-00453-y

We examine the effect of the Coulomb interaction on the mobility and diffusion of spin packets in doped semiconductors. We find that the diffusion constant is reduced, relative to its non-interacting value, by the combined effect of Coulomb-enhanced spin susceptibility and spin Coulomb drag. In ferromagnetic semiconductors, the spin diffusion constant vanishes at the ferromagnetic transition temperature.

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