Suppression of metallic behavior in two dimensions by spin flip scattering

Details Suppression of metallic behavior in two dimensions by spin flip scattering Suppression of metallic behavior in two dimensions by spin flip scattering

1999-05-11

arxiv.org/abs/cond-mat/9905141v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, latex, (usues moriond.sty, included) plus three postscript figures, Proceedings of the Rencontres de Moriond 1999

Scientific paper

We study the effect of the disorder on the metallic behavior of a two-dimensional electron system in silicon. The temperature dependence of conductivity $\sigma (T)$ 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 $d\sigma/dT$. In fact, the data suggest that in the limit of $T\to 0$ the metallic behavior, as characterized by $d\sigma/dT < 0$, is suppressed by an arbitrarily small amount of spin flip scattering by local magnetic moments.

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