Transition to a Superconductor with Insulating Cavities

Details Transition to a Superconductor with Insulating Cavities Transition to a Superconductor with Insulating Cavities

2004-07-22

arxiv.org/abs/cond-mat/0407599v1

Europhys. Lett., 67 (3), pp. 446--452 (2004)

Physics

Condensed Matter

Superconductivity

7 pages, 4 figures, to be published in Europhysics Letters

Scientific paper

10.1209/epl/i2004-10072-2

An extreme type II superconductor with internal insulating regions, namely cavities, is studied here. We find that the cavity-bearing superconductor has lower energy than the defect-free superconductor above a critical magnetic induction $B^*$ for insulating cavities but not for metallic ones. Using a numerical approach for the Ginzburg-Landau theory we compute and compare free energy densities for several cavity radii and at least for two cavity densities, assuming a cubic lattice of spherical cavities.

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