Microscopic theory of thermal phase slips in clean narrow superconducting wires

Details Microscopic theory of thermal phase slips in clean narrow superconducting wires Microscopic theory of thermal phase slips in clean narrow superconducting wires

2007-03-15

arxiv.org/abs/cond-mat/0703413v1

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevLett.98.197005

We consider structure of a thermal phase-slip center for a simple microscopic model of a clean one-dimensional superconductors in which superconductivity occurs only within one conducting channel or several identical channels. Surprisingly, the Eilenberger equations describing the saddle-point configuration allow for exact analytical solution in the whole temperature and current range. This solution allows us to derive a closed expression for the free-energy barrier, which we use to compute its temperature and current dependences.

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