Uniform impurity scattering in two-band $s_{\pm }$ and $s_{++}$ superconductors

Abstract

The $s_{\pm }$ and $s_{++}$ models for the superconducting state are subject of intense studies regarding Fe-based superconductors. Depending on the parameters, disorder may leave intact or suppress $T_c$ in these models. Here we study the special case of disorder with equal values of intra- and interband impurity potentials in the two-band $s_{\pm }$ and $s_{++}$ models. We show that this case can be considered as an isolated point and $T_c$ there has maximal damping for a wide range of parameters.

arXiv comment5 pages, submitted to J. Supercond. Nov. Magn., talk on this subject was presented at the 5th International Conference "Fundamental Problems of High-Temperature Superconductivity" (FPS'15) http://fps15.lebedev.ru/en/

References in corpus (18)

• The Puzzle of High Temperature Superconductivity in Layered Iron Pnictides and Chalcogenides
• Superconductivity in Iron Compounds
• High-temperature superconductivity in iron-based materials
• Gap symmetry and structure of Fe-based superconductors
• Orbital Fluctuation Mediated Superconductivity in Iron Pnictides: Analysis of Five Orbital Hubbard-Holstein Model
• Violation of Anderson's Theorem for Sign-Reversing s-Wave State of Iron-Pnictide Superconductors
• Effect of magnetic and non-magnetic impurities on highly anisotropic superconductivity
• NMR relaxation rate in superconducting pnictides: extended $s_{\pm }$ scenario
• Superfluid density of the $\pm$s-wave state for the iron-based superconductors
• Resonant impurity scattering in the $\pm$s-gap state of the Fe-based superconductors
• Disorder induced transition between s_+- and s_++ states in two-band superconductors
• Impurity Effects in Sign Reversing Fully-Gapped Superconductors: Analysis of FeAs Superconductors
• Anisotropic impurities in anisotropic superconductors
• Sign reversal of the order parameter in s-wave superconductors
• Unexpected impact of magnetic disorder on multiband superconductivity
• Manifestation of impurity induced s_{+-} -> s_{++} transition: multiband model for dynamical response functions
• Zn-impurity effect and interplay of $s_{\pm }$- and $s_{++}$-pairings in Fe-based superconductors
• Disorder effects in multiorbital $s_{\pm }$-wave superconductors: Implications for Zn-doped BaFe${}_2$As${}_2$ compounds

Cited by in corpus (3)

• Impurities in multiband superconductors
• Interband coupling and transport interband scattering in $s_{\pm }$ superconductors
• Details of the disorder-induced transition between $s_{\pm }$ and $s_{++}$ states in two-band model for Fe-based superconductors