Suppression of Superconductivity in Mesoscopic Superconductors

Details Suppression of Superconductivity in Mesoscopic Superconductors Suppression of Superconductivity in Mesoscopic Superconductors

2000-12-08

arxiv.org/abs/cond-mat/0012138v1

Physics

Condensed Matter

Superconductivity

To appear in Phys. Rev. Lett. Vol. 86 (15 Jan. 2001)

Scientific paper

10.1103/PhysRevLett.86.716

We propose a new boundary-driven phase transition associated with vortex nucleation in mesoscopic superconductors (of size of the order of, or larger than, the penetration depth). We derive the rescaling equations and we show that boundary effects associated with vortex nucleation lowers the conventional transition temperature in mesoscopic superconductors by an amount which is a function of the size of the superconductor. This result explains recent experiments in small superconductors where it was found that the transition temperature depends on the size of the system and is lower than the critical Berezinsk\u{i}-Kosterlitz-Thouless temperature.

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