Intermediate type-I superconductors in the mesoscopic scale
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Data
2021-01-07
Autores
Cadorim, Leonardo Rodrigues [UNESP]
Romaguera, Antonio Rodrigues de Castro
Oliveira, Isaias Gonzaga de
Gomes, Rodolfo Ribeiro
Doria, Mauro Melchiades
Sardella, Edson [UNESP]
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Editor
APS
Resumo
M. Tinkham [Introduction to Superconductivity, 2nd ed. (Dover, Mineola, NY, 2004), Chap. 4, pp. 135–138] and P. G. de Gennes [Superconductivity of Metals and Alloys (Benjamin, New York, 1966), Chap. 6, pp. 199–201] described the existence of an intermediate type-I superconductor as a consequence of an external surface that affects the well-known classification of superconductors into type I and II. Here we consider the mesoscopic superconductor where the volume-to-area ratio is small and the effects of the external surface are enhanced. By means of the standard Ginzburg-Landau theory, the Tinkham–de Gennes scenario is extended to the mesoscopic type-I superconductor. We find additional features of the transition at the passage from the genuine to the intermediate type I. The latter has two distinct transitions, namely from a paramagnetic to diamagnetic response in descending field, and a quasi-type-II behavior as the critical coupling is approached in ascending field. The intermediate type-I phase proposed here, and its corresponding transitions, reflect intrinsic features of the superconductor and not its geometrical properties.
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Palavras-chave
Superconductivity, Type-I superconductivity, Time-dependent Ginzburg-Landau equation.
Como citar
Cadorim, L. R., Romaguera, A. R. D. C., de Oliveira, I. G., Gomes, R. R., Doria, M. M., & Sardella, E. (2021). Intermediate type-I superconductors in the mesoscopic scale. Physical Review B, 103(1), 014504.