Abstract
A stochastic model, proposed first by Landauer and Büttiker to explain the phenomenon of persistent currents in submicrometer normal metal rings, is developed quantitatively by determining the relevant relaxation time scales. The current excited by a periodically modulated magnetic field threading the ring is computed as the sum of two clear-cut components: a persistent current and a driven current. The latter component provides a notable example of astochastic resonance mechanism in solid-state physics.
Key words
mesoscopics persistent currents stochastic resonancePreview
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© Plenum Publishing Corporation 1993