Universal scaling of the order-parameter distribution in strongly   disordered superconductors
  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. 
G. Lemari\'e, A. Kamlapure, D. Bucheli, L. Benfatto, J. Lorenzana, G.   Seibold, S. C. Ganguli, P. Raychaudhuri and C. Caste...
cond-mat.supr-con cond-mat.dis-nn