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 also describes the experimental data with excellent accuracy. These results can provide a breakthrough in our understanding of the SIT.
Author: | Gabriel Lemarié, Anand Kamlapure, Lara BenfattoORCiD, José LorenzanaORCiD, Götz SeiboldORCiD, S. C. Ganguli, Pratap Raychaudhuri, Claudio Castellani |
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URL: | http://journals.aps.org/prb/abstract/10.1103/PhysRevB.87.184509 |
DOI: | https://doi.org/10.1103/PhysRevB.87.184509 |
ISSN: | 2469-9977 |
Title of the source (English): | Physical Review B |
Document Type: | Scientific journal article peer-reviewed |
Language: | English |
Year of publication: | 2013 |
Volume/Year: | 87 |
Issue number: | 18 |
First Page: | 184509 |
Faculty/Chair: | Fakultät 1 MINT - Mathematik, Informatik, Physik, Elektro- und Informationstechnik / FG Computational Physics |