@Article{Granato:2016:MaFlDi,
author = "Granato, Enzo",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "Magnetic flux disorder and superconductor-insulator transition in
nanohole thin films",
journal = "Physical Review B",
year = "2016",
volume = "94",
number = "6",
pages = "060504",
month = "Aug.",
abstract = "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.",
doi = "10.1103/PhysRevB.94.060504",
url = "http://dx.doi.org/10.1103/PhysRevB.94.060504",
issn = "1098-0121",
language = "en",
targetfile = "granato_magnetic.pdf",
urlaccessdate = "27 abr. 2024"
}