Dissipation mechanism above the current threshold in Josephson junction chains
Mesoscale and Nanoscale Physics
2013-10-17 v1
Abstract
We present measurements on one-dimensional Josephson junction arrays formed by a chain of SQUID loops in the regime where . We observe a blockaded zero current branch for small bias voltages. Above a certain voltage the - characteristics changes discontinuously to a dissipative branch characterized by a flux dependent conductance. Three of four samples show a pronounced hysteresis for a forward and backward voltage sweep. We observe a periodic field dependence of the conductance above which can be described with theory for cooper-pairs and therefore gives evidence of viscous dynamics of Cooper pair transport through the array.
Cite
@article{arxiv.1310.4295,
title = {Dissipation mechanism above the current threshold in Josephson junction chains},
author = {Roland Schäfer and Wanyin Cui and Kai Grube and Hannes Rotzinger and Alexey V. Ustinov},
journal= {arXiv preprint arXiv:1310.4295},
year = {2013}
}
Comments
11 pages, 6 figures