Distribution of supercurrent switching in graphene under proximity effect
Superconductivity
2015-05-30 v2
Abstract
We study the stochastic nature of switching current in hysteretic current-voltage characteristics of superconductor-graphene-superconductor (SGS) junctions. We find that the dispersion of the switching current distribution scales with temperature as a power law with the power close to 1/3. This observation is in sharp contrast with the known Josephson junction behavior where switching current dispersion is expected to scale with the power 2/3. We propose an explanation using a generalized version of Kurkijarvi's theory for the flux stability in rf-SQUID and attribute this anomalous effect to the temperature dependence of the critical current which persists down to low temperatures.
Keywords
Cite
@article{arxiv.1109.6284,
title = {Distribution of supercurrent switching in graphene under proximity effect},
author = {U. C. Coskun and M. Brenner and T. Hymel and V. Vakaryuk and A. Levchenko and A. Bezryadin},
journal= {arXiv preprint arXiv:1109.6284},
year = {2015}
}
Comments
9 pages, 7 figures