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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.)

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

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Granato, Enzo
Total Authors: 1
Document type: Journal article
Source: Physical Review B; v. 94, n. 6 AUG 1 2016.
Web of Science Citations: 3

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)

FAPESP's process: 14/15372-3 - Dynamics and topological defects in periodic media
Grantee:Enzo Granato
Support type: Regular Research Grants