Functional renormalization group study of an eight-band model for the iron arsenides

J. Lichtenstein, S.A. Maier, C. Honerkamp, C. Platt, Ronny Thomale, O.K. Andersen, Lilia Boeri

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We investigate the superconducting pairing instabilities of eight-band models for the iron arsenides. Using a functional renormalization group treatment, we determine how the critical energy scale for superconductivity depends on the electronic band structure. Most importantly, if we vary the parameters from values corresponding to LaFeAsO to SmFeAsO, the pairing scale is strongly enhanced, in accordance with the experimental observation. We analyze the reasons for this trend and compare the results of the eight-band approach to those found using five-band models.
Original languageEnglish
Article number214514
JournalPhysical Review B
Publication statusPublished - 2014

Fields of Expertise

  • Advanced Materials Science

Treatment code (Nähere Zuordnung)

  • Theoretical

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