Orbital density wave induced by electron-lattice coupling in orthorhombic iron pnictides

Abstract

In this paper we explore the magnetic and orbital properties closely related to a tetragonal-orthorhombic structural phase transition in iron pnictides based on both two- and five-orbital Hubbard models. The electron-lattice coupling, which interplays with electronic interaction, is self-consistently treated. Our results reveal that the orbital polarization stabilizes the spin density wave (SDW) order in both tetragonal and orthorhombic phases. However, the ferro-orbital density wave (F-ODW) only occurs in the orthorhombic phase rather than in the tetragonal one. Magnetic moments of Fe are small in the intermediate Coulomb interaction region for the striped antiferromangnetic phase in the realistic five orbital model. The anisotropic Fermi surface in the SDW/ODW orthorhombic phase is well in agreement with the recent angle-resolved photoemission spectroscopy experiments. These results suggest a scenario that the magnetic phase transition is driven by the ODW order mainly arising from the electron-lattice coupling.

21 pages, 10 figures

References in corpus (44)

• 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
• Evidence for an electron nematic phase transition in underdoped iron pnictide superconductors
• Magnetic order in BaFe2As2, the parent compound of the FeAs based superconductors in a new structural family
• Near-degeneracy of several pairing channels in multiorbital models for the Fe-pnictides
• Strong Correlations and Magnetic Frustration in the High Tc Iron Pnictides
• Competing Orders and Spin-Density-Wave Instability in La(O${}_{1-x}$F${}_x$)FeAs
• Theory of Electron Nematic Order in LaOFeAs
• Incommensurate magnetic order in the alpha-Fe(Te,Se) superconductor systems
• Symmetry breaking orbital anisotropy on detwinned Ba(Fe1-xCox)2As2 above the spin density wave transition
• Origin of the ~150 K Anomaly in LaOFeAs; Competing Antiferromagnetic Superexchange Interactions, Frustration, and Structural Phase Transition
• Correlated electronic structure of LaOFeAs
• A minimal two-band model for the superconducting Fe-pnictides
• Ising and Spin orders in Iron-based Superconductors
• The challenge of unravelling magnetic properties in LaFeAsO
• Spin-orbital frustrations and anomalous metallic state in iron-pnictide superconductors
• Nodal Spin Density Wave and band topology of the FeAs based materials
• Proximity of antiferromagnetism and superconductivity in LaO${}_{1-x}$F${}_x$FeAs: effective Hamiltonian from ab initio studies
• Antiferromagnetic superexchange interactions in LaOFeAs
• Orbital Order and Spontaneous Orthorhombicity in Iron Pnictides
• Spin fluctuations and superconductivity in a 3D tight-binding model for BaFe2As2
• Magnetic and structural transitions in layered FeAs systems: AFe2As2 versus RFeAsO compounds
• Spin-triplet p-wave pairing in a 3-orbital model for iron pnictide superconductors
• Low energy spin waves and magnetic interactions in SrFe${}_2$As${}_2$
• Structure and Magnetic Order in the NdFeAs(O,F) Superconductor System
• Theory of the Magnetic Moment in Iron Pnictides
• Magnetic Order of the Iron Spins in NdOFeAs
• Anisotropic charge dynamics in detwinned Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Orbital Fluctuation Theory in Iron Pnictides: Effects of As-Fe-As Bond Angle, Isotope Substitution, and $Z^2$-Orbital Pocket on the Superconductivity
• Valley density-wave and multiband superconductivity in Fe-pnictides
• A Generic Two-band Model for Unconventional Superconductivity and Spin-Density-Wave Order in Electron and Hole Doped Iron-Based Superconductors
• Neutron and ARPES Constraints on the Couplings of the Multiorbital Hubbard Model for the Pnictides
• Low magnetization and anisotropy in the antiferromagnetic state of undoped iron pnictides
• Magnetic and Metallic State at Intermediate Hubbard U Coupling in Multiorbital Models for Undoped Fe Pnictides
• Columnar magnetic structure coupled with orthorhombic distortion in the antiferromagnetic iron arsenide SrFe${}_2$As${}_2$
• Orbital-weight redistribution triggered by spin order in the pnictides
• Tight binding model for iron pnictides
• Theory of Valley-Density Wave and Hidden Order in Iron-Pnictides
• Magnetic order in orbital models of the iron pnictides
• Multiorbital Effects on Antiferromagnetism in Fe Pnictides
• Orbital Degeneracy and the Microscopic Model of the FeAs Plane in the Iron-Based Superconductors
• Constraints Imposed by Symmetry on Pairing Operators for the Pnictides
• Orbital-transverse density-wave instabilities in iron-based superconductors

Cited by in corpus (14)

• Preemptive nematic order, pseudogap, and orbital order in the iron pnictides
• Orbitally and Magnetically Induced Anisotropy in Iron-based Superconductors
• Localization and Orbital Selectivity in Iron-Based Superconductors with Cu Substitution
• Role of Hydrogen in the Electronic Properties of CaFeAsH-based Superconductors
• Coexistence of localized and itinerant magnetism in intercalated iron-selenide (Li,Fe)OHFeSe
• Band-filling and correlation controlling electronic properties and magnetism in K${}_x$Fe${}_{2-y}$Se${}_2$: A slave boson study
• Influence of electronic correlations on orbital polarizations in the parent and doped iron pnictides
• The role of orbital order in the stabilization of the $(\pi ,0)$ ordered magnetic state in a minimal two-band model for iron pnictides
• Possible Nematic Order Driven by Magnetic Fluctuations in Iron Pnictides
• Universal quasi-degenerate orbital origin of two-dome phases in iron pnictide superconductors
• Metal-insulator transition and superconductivity in the two-orbital Hubbard-Holstein model for iron-based superconductors
• The influence of the structural transition on magnetic fluctuations in NaFeAs
• Interplay of iron and rare-earth magnetic order in rare-earth iron pnictide superconductors under magnetic field
• Temperature and doping dependence of normal state spectral properties in a two-orbital model for ferropnictides