Anomalous proximity effect in an inhomogeneous disordered superconductor
  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. 
W. Escoffier, C. Chapelier, N. Hadacek and J-C. Villegier