Closed Abrikosov Vortices in a Superconducting Cylinder
arXiv:cond-mat/9305035 · doi:10.1016/0921-4534(93)90764-H
Abstract
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.
arXiv commentLaTex using revtex, 12 pages. 5 Figures available upon request from [email protected] Accepted for publication in Physica C