Fluxon mobility in an asymmetric SQUID array
Abstract
Fluxon dynamics in the dc-biased array of asymmetric three-junction superconducting quantum interference devices (SQUIDs) is investigated. The array of SQUIDs is described by the discrete double sine-Gordon equation. It appears that this equation possesses a finite set of velocities at which the fluxon propagates with the constant shape and without radiation. The signatures of these velocities appear on the respective current-voltage characteristics of the array as inaccessible voltage intervals (gaps). The critical depinning current has a clear minimum as a function of the asymmetry parameter (the ratio of the critical currents of the left and right junctions of the SQUID), which coincides with the minimum of the Peierls-Nabarro potential.
Keywords
Cite
@article{arxiv.1411.5885,
title = {Fluxon mobility in an asymmetric SQUID array},
author = {Yaroslav Zolotaryuk and Ivan O. Starodub},
journal= {arXiv preprint arXiv:1411.5885},
year = {2014}
}
Comments
10 pages, 9 figures