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

Authors
  • Chiappe, G.
  • Sánchez, M. J.
Type
Preprint
Publication Date
Aug 01, 2001
Submission Date
Aug 01, 2001
Identifiers
DOI: 10.1103/PhysRevB.65.153409
arXiv ID: cond-mat/0108025
Source
arXiv
License
Unknown
External links

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 $w$, $< I_{typ}> \sim w^{- \gamma}$ with $\gamma < 2$. 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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