Excess current in superconducting Sr$_2$RuO$_4$
Superconductivity
2009-11-10 v2 Strongly Correlated Electrons
Abstract
We present results from point-contact measurements on SrRuO that show a linear dependence of the excess current as a function of temperature and applied magnetic fields over a surprisingly wide range of the phase diagram. We propose an explanation of this finding in terms of a p-wave triplet-pairing state with coupling to a low-energy fluctuation mode. Within this model we obtain a quantitative description of the temperature dependence of the excess current. The impact of surface effects on order parameter and excess current is addressed.
Cite
@article{arxiv.cond-mat/0301221,
title = {Excess current in superconducting Sr$_2$RuO$_4$},
author = {F. Laube and G. Goll and M. Eschrig and M. Fogelström and Ralph Werner},
journal= {arXiv preprint arXiv:cond-mat/0301221},
year = {2009}
}
Comments
4 pages REVTeX, 3 figures; Using a modified p-wave model are able to reproduce the linear temperature dependence of the excess current. This is discussed in a new paragraph