Orbital-lattice coupling and orbital ordering instability in iron pnictides

Abstract

Orbital-ordering instability arising due to the intrapocket nesting is investigated for the tight-binding models of pnictides in the presence of orbital-lattice coupling. The incommensurate instabilities with small momentum, which may play an important role in the nematic-ordering transition, vary from model to model besides being more favorable in comparison to the spin-density wave instability in the absence of good interpocket nesting. We also examine the doping dependence of such instabilities. The electron-phonon coupling parameter required to induce them are compared with the first-principle calculations.

References in corpus (21)

• Unconventional pairing originating from disconnected Fermi surfaces in superconducting LaFeAsO${}_{1-x}$F${}_x$}
• Nematic order in iron superconductors - who is in the driver's seat?
• LaFeAsO${}_{1-x}$F${}_x$: A low carrier density superconductor near itinerant magnetism
• Spin density wave anomaly at 140 K in the ternary iron arsenide BaFe2As2
• Near-degeneracy of several pairing channels in multiorbital models for the Fe-pnictides
• Is LaO${}_{1-x}$F${}_x$FeAs an electron-phonon superconductor ?
• Correlated electronic structure of LaOFeAs
• A minimal two-band model for the superconducting Fe-pnictides
• Nematic and meta-nematic transitions in the iron pnictides
• Orbital-driven nematicity in FeSe
• Electronic structure of the iron-based superconductor LaOFeP
• Proximity of antiferromagnetism and superconductivity in LaO${}_{1-x}$F${}_x$FeAs: effective Hamiltonian from ab initio studies
• Orbital Order and Spontaneous Orthorhombicity in Iron Pnictides
• Coulomb repulsion and correlation strength in LaFeAsO from Density Functional and Dynamical Mean-Field Theories
• Magnetic and Metallic State at Intermediate Hubbard U Coupling in Multiorbital Models for Undoped Fe Pnictides
• Orbital-weight redistribution triggered by spin order in the pnictides
• Fermi Surface and Band Renormalization in (Sr,K)Fe${}_2$As${}_2$ Superconductor from Angle-Resolved Photoemission Spectroscopy
• Tight binding model for iron pnictides
• Linear Response Theory for Shear Modulus $C_{66}$ and Raman Quadrupole Susceptibility: Significant Evidence for Orbital Nematic Fluctuations in Fe-Based Superconductors
• Multiorbital Effects on Antiferromagnetism in Fe Pnictides
• Cooperative effects of Coulomb and electron-phonon interactions in the two-dimensional 16-band d-p model for iron-based superconductors