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

G.CHIAPPE AND M.J. SÁNCHEZ

PHYSICAL REVIEW B - CONDENSED MATTER AND MATERIALS PHYSICS

Año: 2002 vol. 65 p. 153409 - 1534094

0163-1829

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&;w2 g with g,2. This is contrasted with previously reported results obtained for cylindrical samples where a scaling ^Ityp&;w22 has been found. Possible links to, up to date, unexplained experimental data are finally discussed.