1.
Phys Rev Lett
; 93(21): 217005, 2004 Nov 19.
Article
in English
| MEDLINE
| ID: mdl-15601055
ABSTRACT
By combining very low temperature scanning tunneling microscopy and spectroscopy on a TiN film we have observed a nonuniform 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 describing superconductor-normal-metal quantum transition.