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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Magnetic flux disorder and superconductor-insulator transition in nanohole thin films

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Autor(es):
Granato, Enzo
Número total de Autores: 1
Tipo de documento: Artigo Científico
Fonte: Physical Review B; v. 94, n. 6 AUG 1 2016.
Citações Web of Science: 3
Resumo

We study the superconductor-insulator transition in nanohole ultrathin films in a transverse magnetic field by numerical simulation of a Josephson-junction array model. Geometrical disorder due to the random location of nanoholes in the film corresponds to random flux in the array model. Monte Carlo simulation in the path-integral representation is used to determine the critical behavior and the universal resistivity at the transition as a function of disorder and average number of flux quanta per cell, f(o). The resistivity increases with disorder for noninteger f(o) while it decreases for integer f(o), and reaches a common constant value in a vortex-glass regime above a critical value of the flux disorder D-f(c). The estimate of D-f(c) and the resistivity increase for noninteger f(o) are consistent with recent experiments on ultrathin superconducting films with positional disordered nanoholes. (AU)

Processo FAPESP: 14/15372-3 - Dinâmica e defeitos topológicos em meios periódicos
Beneficiário:Enzo Granato
Linha de fomento: Auxílio à Pesquisa - Regular