Intrinsic Resistive Transition in Narrow Superconducting Channels
J. S. LangerLaboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New YorkVinay AmbegaokarLaboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York
1967en
ABI
Abstract
We present a theory of current-reducing fluctuations in narrow superconducting channels. The theory is based on the Ginzburg-Landau equation, and is constructed in analogy with the droplet model of the condensation of a supersaturated vapor. Our theory suggests that large and improbable fluctuations are important, and cause measurable departures from the mean-field critical current. The calculation leads to a concrete result for the intrinsic resistive transition. This transition is predicted to occur at a temperature slightly lower than the bulk transition temperature, and to have a width which is observable but smaller than those measured in recent experiments.
Identifiers
Citations and references
Cited by 40 references