Non-conventional vortex configurations in a mesoscopic flat disk

► We study the influence of defects on the vortex configurations in a mesoscopic disk. ► We found new vortex configurations. ► We found stable vortex states for different number of defects on the disk. The influence of superficial defects on the vortex configurations of a thin superconducting disk i...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2013-04, Vol.487, p.47-55
Main Authors: Barba-Ortega, J., Sardella, Edson, Albino Aguiar, J., Peeters, F.M.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Defects
Density
Disks
Exact sciences and technology
Fluid flow
Formalism
Free energy
Ginzburg–Landau
Mesoscopic and nanoscale systems
Mesoscopic samples
Physics
Properties of type I and type II superconductors
Superconducting films and low-dimensional structures
Superconductivity
Vortex
Vortex lattices ,flux pinning, flux creep
Vortices
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Summary:► We study the influence of defects on the vortex configurations in a mesoscopic disk. ► We found new vortex configurations. ► We found stable vortex states for different number of defects on the disk. The influence of superficial defects on the vortex configurations of a thin superconducting disk is investigated within the time dependent Ginzburg–Landau formalism. The free energy, magnetization, vorticity, and the Cooper pair density are calculated for both metastable and stable vortex configurations and different number of defects on its surface in the presence of an external magnetic field applied perpendicular to the disk area. We show that the competition between the confinement geometry and the geometric position of the defects leads to non-conventional vortex configurations which are not compatible with the symmetry of the sample geometry.
ISSN:0921-4534
1873-2143
DOI:10.1016/j.physc.2013.01.021