Disorder induced transition between s_+- and s_++ states in two-band superconductors
| Autor: | Efremov, D.V., Korshunov, M.M., Dolgov, O.V., Golubov, Alexandre Avraamovitch, Hirschfeld, P.J. |
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| Přispěvatelé: | Interfaces and Correlated Electron Systems, Faculty of Science and Technology |
| Rok vydání: | 2011 |
| Předmět: |
Superconductivity (cond-mat.supr-con)
Condensed Matter - Strongly Correlated Electrons Strongly Correlated Electrons (cond-mat.str-el) Condensed Matter - Superconductivity Condensed Matter::Superconductivity METIS-280348 FOS: Physical sciences Condensed Matter::Strongly Correlated Electrons IR-104494 |
| Zdroj: | Physical Review B (Condensed Matter and Materials Physics), 84(18):180512. American Institute of Physics |
| ISSN: | 0163-1829 |
| DOI: | 10.48550/arxiv.1104.3840 |
| Popis: | We have reexamined the problem of disorder in two-band superconductors, and shown within the framework of the T-matrix approximation, that the suppression of T_c can be described by a single parameter depending on the intraband and interband impurity scattering rates. T_c is shown to be more robust against nonmagnetic impurities than would be predicted in the trivial extension of Abrikosov-Gor'kov theory. We find a disorder-induced transition from the s_{\pm} state to a gapless and then to a fully gapped s_{++} state, controlled by a single parameter -- the sign of the average coupling constant . We argue that this transition has strong implications for experiments. Comment: 5 pages, 4 figures; suppl. material: 3 pages, 2 figures; published version |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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