The inequality of charge and spin diffusion coefficients

Details The inequality of charge and spin diffusion coefficients The inequality of charge and spin diffusion coefficients

2008-07-14

arxiv.org/abs/0807.2229v1

Journal of Applied Physics, 104, 014304 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1063/1.2951448

Since spin and charge are both carried by electrons (or holes) in a solid, it is natural to assume that charge and spin diffusion coefficients will be the same. Drift-diffusion models of spin transport typically assume so. Here, we show analytically that the two diffusion coefficients can be vastly different in quantum wires. Although we do not consider quantum wells or bulk systems, it is likely that the two coefficients will be different in those systems as well. Thus, it is important to distinguish between them in transport models, particularly those applied to quantum wire based devices

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