Nucleation of superconductivity in mesoscopic star-shaped superconductors

D. Dikin, V. Chandrasekhar, V. Misko, V. Fomin and J. Devreese ()

The European Physical Journal B: Condensed Matter and Complex Systems, 2003, vol. 34, issue 2, 231-235

Abstract: 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 $\xi (T)$ . Detailed measurements and numerical calculations show that the nucleation of superconductivity in this device is very inhomogeneous: the superconducting order parameter is strongly enhanced and mostly robust in regions close to multiple boundaries. The strong inhomogeneity of the order parameter results in a rich structure of the superconducting transition as a function of temperature and magnetic field. Copyright Springer-Verlag Berlin/Heidelberg 2003

Date: 2003
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DOI: 10.1140/epjb/e2003-00216-2

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