Dichotomy between large local and small ordered magnetic moment in Iron-based superconductors

Abstract

We study a four band model for iron-based superconductors within local density approximation + dynamical mean field theory (LDA+DMFT). This successfully reproduces the results of models which take As p degrees of freedom explicitly into account and has several physical advantages over the standard five d-band model. Our findings reveal that the new superconductors are more strongly correlated than their single-particle properties suggest. Two-particle correlation functions unveil the dichotomy between local and ordered magnetic moments in these systems, calling for further experiments to better resolve the short time scale spin dynamics.

4 pages, 3 figures

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Cited by in corpus (8)

• Orbital Order and Spontaneous Orthorhombicity in Iron Pnictides
• Unified Picture for Magnetic Correlations in Iron-Based Superconductors
• On the multi-orbital band structure and itinerant magnetism of iron-based superconductors
• Effects of magnetism and doping on the electron-phonon coupling in BaFe${}_2$As${}_2$
• Competing Pairing Symmetries in a Generalized Two-Orbital Model for the Pnictides
• Linear-Temperature Dependence of Static Magnetic Susceptibility in LaFeAsO from Dynamical Mean-Field Theory
• Magnetic order in orbital models of the iron pnictides
• Magnetic Properties of Ab initio Model for Iron-Based Superconductors LaFeAsO