Journal article

Dynamics of vortices in disordered Josephson junctions arrays

We have studied a two-dimensional disordered Josephson Junction Array (JJA), where sites (or bonds) have been randomly removed with a given probability 1 − p. These defect regions of the array are modelled by a fixed distribution of holes, which are considered as being circular. We calculate the vortex mobility as a function of frequency, ω. When the holes are considered as having the same size, the former increases almost monotonically when the frequency gets higher, tending then to the value of the regular lattice as ω → ∞. For holes of different sizes, a similar behavior results from the superposition of the contribution from each family of holes.


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