Persistent currents in diffusive metallic cavities: Large values and anomalous scaling with disorder
G. Chiappe, M. J. Sánchez
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 < Ityp> with the strength of disorder w, < Ityp> w- γ with γ< 2. This is contrasted with previously reported results obtained for cylindrical samples where a scaling < Ityp> w-2 has been found. Possible links to, up to date, unexplained experimental data are finally discussed.
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