Universal scaling of the order-parameter distribution in strongly disordered superconductors
Superconductivity
2013-09-25 v2 Disordered Systems and Neural Networks
Abstract
We investigate theoretically and experimentally the statistical properties of the inhomogeneous order-parameter distribution (OPD) at the verge of the superconductor-insulator transition (SIT). We find within two prototype fermionic and bosonic models for disordered superconductors that one can identify a universal rescaling of the OPD. By performing scanning-tunneling microscopy experiments in three samples of NbN with increasing disorder we show that such a rescaling describes also with an excellent accuracy the experimental data. These results can provide a breakthrough in our understanding of the SIT.
Keywords
Cite
@article{arxiv.1208.3336,
title = {Universal scaling of the order-parameter distribution in strongly disordered superconductors},
author = {G. Lemarié and A. Kamlapure and D. Bucheli and L. Benfatto and J. Lorenzana and G. Seibold and S. C. Ganguli and P. Raychaudhuri and C. Castellani},
journal= {arXiv preprint arXiv:1208.3336},
year = {2013}
}
Comments
11 pages, 8 figures, revised version submitted to PRB