Closed Abrikosov Vortices in a Superconducting Cylinder

Details Closed Abrikosov Vortices in a Superconducting Cylinder Closed Abrikosov Vortices in a Superconducting Cylinder

1993-05-27

arxiv.org/abs/cond-mat/9305035v1

Physica C 213, 103 (1993)

Physics

Condensed Matter

LaTex using revtex, 12 pages. 5 Figures available upon request from samokh@appl.nnov.su Accepted for publication in Physica C

Scientific paper

10.1016/0921-4534(93)90764-H

The new type of solutions of the London equation for type-II superconductors is obtained to describe the ring-shaped (toroidal) Abrikosov vortices. The specific feature of these solutions is the self-consistent localization of both the supercurrent and the magnetic field, enabling one to construct compact magnetic structures inside a superconductor. The torus vortex contraction caused by the vortex instability leads to the destruction of the Cooper pairing and the formation of a normal electron stream in the vicinity of the torus axis. The thermodynamic condition for the excitation of a small closed vortex by a bunch of charged particles contains the fine-structure constant as a determining parameter.

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