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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Intermediate type-I superconductors in the mesoscopic scale

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Author(s):
Cadorim, Leonardo R. [1] ; Romaguera, Antonio R. de C. [2] ; de Oliveira, Isaias G. [3] ; Gomes, Rodolpho R. [4] ; Doria, Mauro M. [5, 6] ; Sardella, Edson [1]
Total Authors: 6
Affiliation:
[1] Univ Estadual Paulista UNESP, Fac Ciencias, Dept Fis, Caixa Postal 473, BR-17033360 Bauru, SP - Brazil
[2] Univ Fed Rural Pernambuco, Dept Fis, BR-52171900 Recife, PE - Brazil
[3] Univ Fed Rural Rio de Janeiro, Dept Fis, BR-23890000 Seropdica, RJ - Brazil
[4] Univ Fed Rio de Janeiro, Inst Quim, BR-21941972 Rio De Janeiro - Brazil
[5] Univ Fed Rio de Janeiro, Inst Fis, BR-21941972 Rio De Janeiro - Brazil
[6] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 6
Document type: Journal article
Source: Physical Review B; v. 103, n. 1 JAN 7 2021.
Web of Science Citations: 0
Abstract

M. Tinkham {[}Introduction to Superconductivity, 2nd ed. (Dover, Mineola, NY, 2004), Chap. 4, pp. 135-138] and P. G. de Gennes {[}Superconductivity of Metals andAlloys (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 1/root 2 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. (AU)

FAPESP's process: 12/04388-0 - Tridimensional simulations of the demagnetization effects in nanostructured superconducting films
Grantee:Edson Sardella
Support Opportunities: Regular Research Grants
FAPESP's process: 20/03947-2 - Characterization of magnetic and electronic properties in mesoscopic and nanostructured multiband superconductors
Grantee:Leonardo Rodrigues Cadorim
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)