Theory of Multiband Superconductivity in Iron Pnictides

2009/02/20 by M. S. Laad, Mukul S. Laad, L. Craco +1 · 1 citation
Materials Science · Physics and Astronomy · #Condensed matter physics #Iron-based superconductors research #Materials science #Physics #Superconductivity #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.103.017002

published as Phys. Rev. Lett. 103, 017002 (2009) · 4 pages, 2 eps figures, submitted to PRL, text modified

arxiv created 2009/02/20 · openalex publication_date 2009/06/30 · arxiv updated 2015/05/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

The precise nature of unconventional superconductivity (SC) in iron pnictides is presently a hotly debated issue. Here, using insights from normal state electronic structure and symmetry arguments, we show how an unconventional SC emerges from the bad metal "normal" state. Short-ranged, multiband spin and charge correlations generate nodeless SC in the active planar dxz,yz bands, and an interband proximity effect induces out-of-plane gap nodes in the passive d3z2-r2 band. While very good quantitative agreement with various key observations in the SC state and reconciliation with NMR and penetration depth data in the same picture are particularly attractive features of our proposal, clinching evidence would be an experimental confirmation of c-axis nodes in future work.

Citations

• Correlated Electronic Structure ofLaO1−xFxFeAs
• Unconventional Superconductivity with a Sign Reversal in the Order Parameter ofLaFeAsO1−xFx
• Signatures of Electronic Correlations in Optical Properties ofLaFeAsO1−xFx
• Normal-state correlated electronic structure of iron pnictides from first principles
• Experimental consequences of thes-wavecos(kx)cos(ky)superconductivity in the iron pnictides
• Model for the Magnetic Order and Pairing Channels in Fe Pnictide Superconductors
• Interband Proximity Effect and Nodes of Superconducting Gap inSr2RuO4
• Field and Temperature Dependence of the Superfluid Density inLaFeAsO1−xFxSuperconductors: A Muon Spin Relaxation Study
• Theory of the Magnetic Moment in Iron Pnictides
• Strong Correlations and Magnetic Frustration in the HighTcIron Pnictides
• Ab initio Derivation of Low-Energy Model for Iron-Based Superconductors LaFeAsO and LaFePO
• Competition of Fermi surface symmetry breaking and superconductivity
• Origin of the 150-K Anomaly in LaFeAsO: Competing Antiferromagnetic Interactions, Frustration, and a Structural Phase Transition

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