ON THE INTRINSIC RESISTIVE TRANSITION IN NARROW SUPERCONDUCTING CHANNELS.
CORNELL UNIV ITHACA N Y LAB OF ATOMIC AND SOLID STATE PHYSICS
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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. Author
- Electricity and Magnetism
- Solid State Physics