Nucleation of superconductivity in mesoscopic star-shaped superconductors

Details Nucleation of superconductivity in mesoscopic star-shaped superconductors Nucleation of superconductivity in mesoscopic star-shaped superconductors

2002-06-07

arxiv.org/abs/cond-mat/0206113v1

Physics

Condensed Matter

Superconductivity

4 pages, 5 figures, E-mail addresses: v-chandrasekhar@northwestern.edu (V. Chandrasekhar), devreese@uia.ua.ac.be (J. T. Devr

Scientific paper

10.1140/epjb/e2003-00216-2

We study the phase transition of a star-shaped superconductor, which covers smoothly the range from zero to two dimensions with respect to the superconducting coherence length. Detailed measurements and numerical calculations show that the nucleation of superconductivity in this device is very inhomogeneous, resulting in rich structure in the superconducting transition as a function of temperature and magnetic field. The superconducting order parameter is strongly enhanced and mostly robust in regions close to multiple boundaries.

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