Suppression of metallic behavior in two dimensions by spin flip scattering

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We study the effect of the disorder on the metallic behavior of a two-dimensional electron system in silicon. The temperature dependence of conductivity $σ(T)$ was measured for different values of substrate bias, which changes both potential scattering and the concentration of disorder-induced local magnetic moments. We find that the latter has a much more profound effect on $dσ/dT$. In fact, the data suggest that in the limit of $T\to 0$ the metallic behavior, as characterized by $dσ/dT < 0$, is suppressed by an arbitrarily small amount of spin flip scattering by local magnetic moments.
5 pages, latex, (usues moriond.sty, included) plus three postscript figures, Proceedings of the Rencontres de Moriond 1999

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Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/29294

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/9905141
 http://arxiv.org/abs/cond-mat/9905141

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arXiv