@Article{Granato:2018:CrBeDy,
author = "Granato, Enzo",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "Critical behavior of dynamic vortex Mott transition in
superconducting arrays at fractional vortex densities",
journal = "Physical Review B",
year = "2018",
volume = "98",
number = "9",
pages = "e094511",
month = "Sept.",
abstract = "We study the differential resistivity transition of
two-dimensional superconducting arrays induced by an external
driving current, in the presence of thermal fluctuations and a
magnetic field corresponding to f flux quantum per plaquette.
Recent experiments have identified this transition as a dynamic
vortex Mott insulator transition at vortex densities near rational
values of f . The critical behavior is determined from a scaling
analysis of the current-voltage relation near the transition,
obtained by Monte Carlo simulations of a Josephson-junction array
model in the vortex representation. For a square-lattice array,
the critical exponents obtained near f = 1/2 are consistent with
the experimental observations. The same scaling behavior is
observed near f = 1/3. For a honeycomb array, although similar
results are obtained for f = 1/3, the transition is absent for f =
1/2, consistent with an incommensurate vortex phase.",
doi = "10.1103/PhysRevB.98.094511",
url = "http://dx.doi.org/10.1103/PhysRevB.98.094511",
issn = "1098-0121",
language = "en",
targetfile = "granato-critical.pdf",
urlaccessdate = "27 abr. 2024"
}