Quantum contributions to the magnetoconductivity of critically disordered superconducting TiN films.
J Phys Condens Matter
; 30(48): 485601, 2018 Dec 05.
Article
em En
| MEDLINE
| ID: mdl-30418946
ABSTRACT
The onset of superconductivity in the presence of disorder is a fundamental problem of condensed matter physics. Here we investigate the magnetoconductance of disordered ([Formula see text]) superconducting TiN films above the critical temperature T c. We show that the magnetoconductivity of moderately disordered films with [Formula see text] is in full agreement with the perturbative theory of quantum contributions to conductivity. We demonstrate that the magnetoconductivity of films with [Formula see text] is also in agreement with the perturbative theory down to temperatures [Formula see text]. The quantitative discrepancy between experiment and theory develops only below temperatures [Formula see text] for films with [Formula see text]. This discrepancy can be eliminated if we assume steeper temperature dependence of the Larkin's electron-electron attraction strength, [Formula see text]. The obtained temperature dependence of electron phase breaking time [Formula see text] is in agreement with theoretical predictions for all samples.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
J Phys Condens Matter
Ano de publicação:
2018
Tipo de documento:
Article