Evolution of the superconducting state of Fe-based compounds with doping

S. Maiti, M. M. Korshunov, T. A. Maier, P. J. Hirschfeld, A. V. Chubukov

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112 Scopus citations

Abstract

We introduce an effective low-energy pairing model for Fe-based superconductors with s- and d-wave interaction components and a small number of input parameters and use it to study the doping evolution of the symmetry and the structure of the superconducting gap. We argue that the model describes the entire variety of pairing states found so far in the Fe-based superconductors and allows one to understand the mechanism of the attraction in s ± and dx2-y2 channels, the competition between s- and d-wave solutions, and the origin of superconductivity in heavily doped systems, when only electron or only hole pockets are present.

Original languageEnglish (US)
Article number147002
JournalPhysical review letters
Volume107
Issue number14
DOIs
StatePublished - Sep 27 2011

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