Threefold onset of vortex loops in superconductors with a magnetic core

Details Threefold onset of vortex loops in superconductors with a magnetic core Threefold onset of vortex loops in superconductors with a magnetic core

2007-12-25

arxiv.org/abs/0712.4077v1

2007 EPL 79 47006 (6pp)

Physics

Condensed Matter

Superconductivity

6 pages, 6 figures (low resolution), latex2e

Scientific paper

10.1209/0295-5075/79/47006

A magnetic inclusion inside a superconductor gives rise to a fascinating complex of {\it vortex loops}. Our calculations, done in the framework of the Ginzburg-Landau theory, reveal that {\it loops always nucleate in triplets} around the magnetic core. In a mesoscopic superconducting sphere, the final superconducting state is characterized by those confined vortex loops and the ones that eventually spring to the surface of the sphere, evolving into {\it vortex pairs} piercing through the sample surface.

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