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Persistent currents in diffusive metallic cavities: Large values and anomalous scaling with disorder

G. Chiappe·M. J. Sánchez
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Abstract

The effect of disorder on confined metallic cavities with an Aharonov-Bohm flux line is addressed. We find that, even deep in the diffusive regime, large values of persistent currents may arise for a wide variety of geometries. We present numerical results supporting an anomalous scaling law of the average typical current $< I_{typ}>$ with the strength of disorder $w$, $< I_{typ}> \sim w^{- γ}$ with $γ< 2$. This is contrasted with previously reported results obtained for cylindrical samples where a scaling $< I_{typ}> \sim w^{-2}$ has been found. Possible links to, up to date, unexplained experimental data are finally discussed.

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G. Chiappe, M. J. Sánchez. 2001-08-01. Persistent currents in diffusive metallic cavities: Large values and anomalous scaling with disorder. https://doi.org/10.1103/physrevb.65.153409

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