Magnetism and Superconductivity in the Two-Dimensional 16 Band d-p Model for Iron-Based Superconductors

Abstract

The electronic states of the Fe2As2 plane in iron-based superconductors are investigated on the basis of the two-dimensional 16-band d-p model which includes the Coulomb interaction on a Fe site: the intra- and inter-orbital direct terms U and U', the Hund's coupling J and the pair-transfer J'. Using the random phase approximation (RPA), we obtain the magnetic phase diagram including the stripe and the incommensurate order on the U'-J plane. We also solve the superconducting gap equation within the RPA and find that, for large J, the most favorable pairing symmetry is extended s-wave whose order parameter changes its sign between the hole pockets and the electron pockets, while it is dxy-wave for small J.

4 pages, 5 figures

References in corpus (10)

• Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems
• Unconventional pairing originating from disconnected Fermi surfaces in superconducting LaFeAsO${}_{1-x}$F${}_x$}
• LaFeAsO${}_{1-x}$F${}_x$: A low carrier density superconductor near itinerant magnetism
• Observation of Fermi-surface-dependent nodeless superconducting gaps in Ba0.6K0.4Fe2As2
• Is LaO${}_{1-x}$F${}_x$FeAs an electron-phonon superconductor ?
• Correlated electronic structure of LaOFeAs
• Evolution from Itinerant Antiferromagnet to Unconventional Superconductor with Fluorine Doping in La(O_{1-x}F_{x})FeAs Revealed by ^{75}As and ^{139}La Nuclear Magnetic Resonance
• Doping-dependent Phase Diagram of LaO{\it M}As ({\it M}=V--Cu) and Electron-type Superconductivity near Ferromagnetic Instability
• Spin-singlet superconductivity with multiple gaps in PrO0.89F0.11FeAs
• On the Superconductivity of LaFe1-yCoyAsO1-xFx

Cited by in corpus (18)

• Iron-Based Superconductors: current status of materials and pairing mechanism
• Momentum dependence and nodes of the superconducting gap in iron-pnictides
• Origin of Gap Anisotropy in Spin Fluctuation Models of the Fe-pnictides
• Neutron Scattering Resonance and the Fe-pnictide Superconducting Gap
• Doping dependence of spin fluctuations and electron correlations in iron pnictides
• Impurity-induced in-gap state and Tc in sign-reversing s-wave superconductors: analysis of iron oxypnictide superconductors
• Theory of Raman response in a superconductor with extended s-wave symmetry: Application to Fe-pnictides
• Single Impurity Problem in Iron-Pnictide Superconductors
• Mottness in two-dimensional van der Waals Nb${}_3$X${}_8$ monolayers (X=Cl, Br, and I)
• Magnetic order in orbital models of the iron pnictides
• Perturbation Theory of High-Tc Superconductivity in Iron Pnictides
• Unconventional density waves and superconductivities in Fe-based superconductors and other strongly correlated electron systems
• Cooperative effects of Coulomb and electron-phonon interactions in the two-dimensional 16-band d-p model for iron-based superconductors
• Character of magnetic instabilities in CaFe2As2
• Normal State Spin Dynamics of Five-band Model for Iron-pnictides
• A High-Tc Mechanism of Iron Pnictide Superconductivity due to Cooperation of Ferro-orbital and Antiferromagnetic Fluctuations
• Unscreening Effect on Fe-Pnictide Superconductor
• Spin density wave in oxypnictide superconductors in a three-band model