Coupled multiple-mode theory for s ± pairing mechanism in iron based superconductors

M. N. Kiselev, D. V. Efremov, S. L. Drechsler, Jeroen Van Den Brink, K. Kikoin

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


We investigate the interplay between the magnetic and the superconducting degrees of freedom in unconventional multi-band superconductors such as iron pnictides. For this purpose a dynamical mode-mode coupling theory is developed based on the coupled Bethe-Salpeter equations. In order to investigate the region of the phase diagram not too far from the tetracritical point where the magnetic spin density wave, (SDW) and superconducting (SC) transition temperatures coincide, we also construct a Ginzburg-Landau functional including both SC and SDW fluctuations in a critical region above the transition temperatures. The fluctuation corrections tend to suppress the magnetic transition, but in the superconducting channel the intraband and interband contribution of the fluctuations nearly compensate each other.

Original languageEnglish
Article number37508
JournalScientific Reports
StatePublished - 29 Nov 2016
Externally publishedYes

ASJC Scopus subject areas

  • General


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