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Utilize este identificador para citar ou criar um link para este item: http://acervodigital.unesp.br/handle/11449/8461
Título: 
Minimum size for the occurrence of vortex matter in a square mesoscopic superconductor
Autor(es): 
Instituição: 
Universidade Estadual Paulista (UNESP)
ISSN: 
0921-4526
Resumo: 
The study of superconducting samples in mesoscopic scale presented a remarkable improvement during the last years. Certainly, such interest is based on the fact that when the size of the samples is close to the order of the temperature dependent coherence length xi(T), and/or the size of the penetration depth lambda(T), there are some significant modifications on the physical properties of the superconducting state. This contribution tests the square cross-section size limit for the occurrence (or not) of vortices in mesoscopic samples of area L-2, where L varies discretely from 1 xi(0) to 8 xi(0).The time dependent Ginzburg-Landau (TDGL) equations approach is used upon taking the order parameter and the local magnetic field invariant along the z-direction. The vortex configurations at the equilibrium can be obtained from the TDGL equations for superconductivity as the system relaxes to the stationary state.The obtained results show that the limit of vortex penetration is for the square sample of size 3 xi(0) x 3 xi(0) in which only a single vortex are allowed into the sample. For smaller specimens, no vortex can be formed and the field entrance into the sample is continuous and the total flux penetration occurs at higher values of H/H-c2(0), where H-c2(T) is the upper critical field. Otherwise, for larger samples different vortices patterns can be observed depending on the sample size. (c) 2007 Elsevier B.V. All rights reserved.
Data de publicação: 
1-Abr-2008
Citação: 
Physica B-condensed Matter. Amsterdam: Elsevier B.V., v. 403, n. 5-9, p. 1494-1496, 2008.
Duração: 
1494-1496
Publicador: 
Elsevier B.V.
Palavras-chaves: 
  • superconductors
  • vortex lattice
  • nanoscale systems
Fonte: 
http://dx.doi.org/10.1016/j.physb.2007.10.247
Endereço permanente: 
Direitos de acesso: 
Acesso restrito
Tipo: 
outro
Fonte completa:
http://repositorio.unesp.br/handle/11449/8461
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