Spin excitations in the nematic phase and the metallic stripe spin-density wave phase of iron pnictides

Abstract

We present a general study of the magnetic excitations within a weak-coupling five-orbital model relevant to itinerant iron pnictides. As a function of enhanced electronic correlations, the spin excitations in the symmetry broken spin-density wave phase evolve from broad low-energy modes in the limit of weak interactions to sharply dispersing spin wave prevailing to higher energies at larger interaction strengths. We show how the resulting spin response at high energies depends qualitatively on the magnitude of the interactions. We also calculate the magnetic excitations in the nematic phase by including an orbital splitting, and find a pronounced C_2 symmetric excitation spectrum right above the transition to long-range magnetic order. Finally, we discuss the C_2 versus C_4 symmetry of the spin excitations as a function of energy for both the nematic and the spin-density wave phase.

10 pages, 10 figures

References in corpus (33)

• Evidence for an electron nematic phase transition in underdoped iron pnictide superconductors
• Theory of Electron Nematic Order in LaOFeAs
• Magnetism and its microscopic origin in iron-based high-temperature superconductors
• Ising and Spin orders in Iron-based Superconductors
• Spin-orbital frustrations and anomalous metallic state in iron-pnictide superconductors
• Magnetism in Fe-based superconductors
• Nodal Spin Density Wave and band topology of the FeAs based materials
• Orbital Order and Spontaneous Orthorhombicity in Iron Pnictides
• Nematic spin correlations in the tetragonal state of uniaxial strained BaFe2-xNixAs2
• Low energy spin waves and magnetic interactions in SrFe${}_2$As${}_2$
• Itinerant magnetic excitations in antiferromagnetic CaFe2As2
• Manifestations of nematic degrees of freedom in the magnetic, elastic, and superconducting properties of the iron pnictides
• Anisotropic itinerant magnetism and spin fluctuations in BaFe2As2: A neutron scattering study
• Nature of magnetic excitations in superconducting BaFe${}_{1.9}$Ni${}_{0.1}$As${}_2$
• High energy spin excitations in BaFe2As2
• Theory of itinerant magnetic excitations in the SDW phase of iron-based superconductors
• Competing orders in FeAs layers
• Antiferromagnetic ordering in the absence of a structural distortion in Ba(Fe{1-x}Mn{x})2As2
• Anisotropic three-dimensional magnetism in CaFe2As2
• Itinerant Spin Excitations in SrFe2As2 Measured by Inelastic Neutron Scattering
• Neutron and ARPES Constraints on the Couplings of the Multiorbital Hubbard Model for the Pnictides
• Orbital differentiation and the role of orbital ordering in the magnetic state of Fe superconductors
• Correlation effects in the iron pnictides
• Spin excitations in the excitonic spin-density-wave state of the iron pnictides
• Magnetic Excitations in the High Tc Iron Pnictides
• Orbital-weight redistribution triggered by spin order in the pnictides
• Spin and Charge Dynamics Ruled by Antiferromagnetic Order in Iron Pnictides
• Enhancing magnetic stripe order in iron pnictides by RKKY exchange interactions
• Magnetic order without tetragonal-symmetry-breaking in iron arsenides: microscopic mechanism and spin-wave spectrum
• Emergent defect states as a source of resistivity anisotropy in the nematic phase of iron pnictides
• Neutron-scattering measurements of the spin excitations in LaFeAsO and Ba(Fe${}_{0.953}$Co${}_{0.047}$)${}_2$As${}_2$: Evidence for a sharp enhancement of spin fluctuations by nematic order
• The magnetic moment enigma in Fe-based high temperature superconductors
• Spin excitations in layered antiferromagnetic metals and superconductors

Cited by in corpus (6)

• Singular magnetic anisotropy in the nematic phase of FeSe
• Spin excitations in hole-overdoped iron-based superconductors
• Collective magnetic excitations of $C_4$ symmetric magnetic states in iron-based superconductors
• Doping evolution of the normal state magnetic excitations in pressurized La3Ni2O7
• Competing magnetic fluctuations and orders in a multiorbital model of doped SrCo${}_2$As${}_2$
• Effect of strain-induced orbital splitting on the magnetic excitations in undoped cuprates