Strong Coupling Theory for Superconducting Iron Pnictides
- 30 January 2009
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 102 (4), 047006-454
- https://doi.org/10.1103/physrevlett.102.047006
Abstract
Superconductivity in iron pnictides is studied by using a two-orbital Hubbard model in the large limit. The Coulomb repulsion induces an orbital-dependent pairing between charge carriers. The pairing is found mainly from the scattering within the same Fermi pocket. The interpocket pair scatterings determine the symmetry of the superconductivity, which is extended wave at small Hund’s coupling, and wave at large Hund’s coupling and large . The former is consistent with recent experiments of angle-resolved photoemission spectroscopy and Andreev reflection spectroscopy.
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This publication has 35 references indexed in Scilit:
- Spin-triplet-wave pairing in a three-orbital model for iron pnictide superconductorsPhysical Review B, 2008
- Experimental consequences of the-wavesuperconductivity in the iron pnictidesPhysical Review B, 2008
- Thorium-doping–induced superconductivity up to 56 K in Gd 1−x Th x FeAsOEurophysics Letters, 2008
- Symmetry of superconducting states with two orbitals on a tetragonal lattice: Application toPhysical Review B, 2008
- Even Parity, Orbital Singlet, and Spin Triplet Pairing for SuperconductingPhysical Review Letters, 2008
- Unconventional Superconductivity with a Sign Reversal in the Order Parameter ofPhysical Review Letters, 2008
- A BCS-like gap in the superconductor SmFeAsO0.85F0.15Nature, 2008
- Magnetic order close to superconductivity in the iron-based layered LaO1-xF x FeAs systemsNature, 2008
- Gossamer Superconductor, Mott Insulator, and Resonating Valence Bond State in Correlated Electron SystemsPhysical Review Letters, 2003
- Magnetic structure ofin the insulating phasePhysical Review B, 1978