By combining very low temperature scanning tunneling microscopy and spectroscopy on a TiN film we have observed a non uniform state comprising of superconducting (S) and normal (N) areas. The local density of states displays a spatial dependence between S and N different from the usual proximity effect. We conclude that mesoscopic fluctuations might play a major role in accordance with recent theories on superconductor-normal metal quantum transition.
@article{arxiv.cond-mat/0403764,
title = {Anomalous proximity effect in an inhomogeneous disordered superconductor},
author = {W. Escoffier and C. Chapelier and N. Hadacek and J-C. Villegier},
journal= {arXiv preprint arXiv:cond-mat/0403764},
year = {2009}
}