Disorder-induced transition betweens±ands++states in two-band superconductors

2011/04/30 by D. V. Efremov, M. M. Korshunov, O. V. Dolgov +2 · 147 citations
Materials Science · Mathematics · Physics and Astronomy · #Algorithm #Computer science #Condensed matter physics #Coupling (piping) #Coupling constant #Impurity #Iron-based superconductors research #Lambda #Materials science #Mathematical analysis #Mathematics #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Rare-earth and actinide compounds #Scattering #Sign (mathematics) #State (computer science) #Superconductivity #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.84.180512

published in Physical Review B 84(18) (American Physical Society) · 5 pages, 4 figures; suppl. material: 3 pages, 2 figures; published version

openalex publication_date 2011/11/16 · arxiv created 2011/11/21 · arxiv updated 2015/03/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

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_\ifmmode±\else\textpm\fi state to a gapless and then to a fully gapped s₊₊ state, controlled by a single parameter---the sign of the average coupling constant \ensuremath⟨\ensuremathλ\ensuremath⟩. We argue that this transition has strong implications for experiments.

Citations

• Isoelectronic Ru substitution at the iron site inSmFe1−xRuxAsO0.85F0.15and its effects on structural, superconducting, and normal-state properties
• Contrasting impurity scattering and pair-breaking effects by doping Mn and Zn inBa0.5K0.5Fe2As2
• Superconductivity inMgB2: Clean or Dirty?
• The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides
• Effect of magnetic and nonmagnetic impurities on highly anisotropic superconductivity
• Impurity effects on the±s-wave state of the iron-based superconductors
• High-temperature superconductivity in iron-based materials

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