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

Abstract

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.

11 pages, 10 figures

References in corpus (15)

• Unconventional pairing originating from disconnected Fermi surfaces in superconducting LaFeAsO${}_{1-x}$F${}_x$}
• High-temperature superconductivity in iron-based materials
• Near-degeneracy of several pairing channels in multiorbital models for the Fe-pnictides
• Funtional Renormalization Group Study of the Pairing Symmetry and Pairing Mechanism of the FeAs Based High Temperature Superconductors
• The electronic phase diagram of the LaO1-xFxFeAs superconductor
• The challenge of unravelling magnetic properties in LaFeAsO
• Coexistence of static magnetism and superconductivity in SmFeAsO1-xFx as revealed by muon spin rotation
• Functional Renormalization Group for multi-orbital Fermi Surface Instabilities
• Spin-triplet p-wave pairing in a 3-orbital model for iron pnictide superconductors
• Momentum dependence and nodes of the superconducting gap in iron-pnictides
• On the multi-orbital band structure and itinerant magnetism of iron-based superconductors
• Renormalized mean-field analysis of antiferromagnetism and d-wave superconductivity in the two-dimensional Hubbard model
• Nodes in the Gap Function of LaFePO, the Gap Function of the Fe(Se,Te) Systems, and the STM Signature of the s${}_{\pm }$ Pairing
• Self-energy flows in the two-dimensional repulsive Hubbard model
• Competing order in correlated electron systems made simple: Consistent fusion of functional renormalization and mean-field theory

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