Effects of Geometrical Symmetry on the Vortex Nucleation and Penetration in Mesoscopic Superconductors

Details Effects of Geometrical Symmetry on the Vortex Nucleation and Penetration in Mesoscopic Superconductors Effects of Geometrical Symmetry on the Vortex Nucleation and Penetration in Mesoscopic Superconductors

2010-06-17

arxiv.org/abs/1006.3372v1

Physics

Condensed Matter

Superconductivity

Scientific paper

We investigate how the geometrical symmetry affects the penetration and arrangement of vortices in mesoscopic superconductors using self-consistent Bogoliubov-de Gennes equations. We find that the entrance of the vortex happens when the current density at the hot spots reaches the depairing current density. Through determining the spatial distribution of hot spots, the geometrical symmetry of the superconducting sample influences the nucleation and entrance of vortices. Our results propose one possible experimental approach to control and manipulate the quantum states of mesoscopic superconductors with their topological geometries, and they can be easily generalized to the confined superfluids and Bose-Einstein condensates.

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