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Uniform Impurity Scattering in Two-Band s ± and s ++ Superconductors

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Abstract

The s ± 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 ± 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.

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Acknowledgments

We are grateful to D.V. Efremov and A.A. Golubov for useful discussions. We acknowledge the partial support by RFBR (Grant 16-02-00098) and President Grant for Government Support of the Leading Scientific Schools of the Russian Federation (NSh-2886.2014.2).

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Authors and Affiliations

  1. Kirensky Institute of Physics, Krasnoyarsk, 660036, Russia

    M. M. Korshunov

  2. Siberian Federal University, Svobodny Prospect 79, Krasnoyarsk, 660041, Russia

    M. M. Korshunov & Yu. N. Togushova

  3. Max-Planck-Institut für Festkörperforschung, 70569, Stuttgart, Germany

    O. V. Dolgov

  4. P.N. Lebedev Physical Institute RAS, Moscow, Russia

    O. V. Dolgov

Authors
  1. M. M. Korshunov
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  2. Yu. N. Togushova
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  3. O. V. Dolgov
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Correspondence to M. M. Korshunov.

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Korshunov, M.M., Togushova, Y.N. & Dolgov, O.V. Uniform Impurity Scattering in Two-Band s ± and s ++ Superconductors. J Supercond Nov Magn 29, 1089–1095 (2016). https://doi.org/10.1007/s10948-016-3385-6

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  • DOI: https://doi.org/10.1007/s10948-016-3385-6

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