Itinerant spin excitations in SrFe2As2measured by inelastic neutron scattering

2010/11/30 by R. A. Ewings, T. G. Perring, J. Gillett +7 · 4 citations
Chemistry · Materials Science · Physics and Astronomy · #Brillouin zone #Chemistry #Condensed matter physics #Crystallography #Diffraction #Inelastic neutron scattering #Iron-based superconductors research #Neutron #Neutron scattering #Nuclear physics #Optics #Orthorhombic crystal system #Phase (matter) #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Rare-earth and actinide compounds #Spin (aerodynamics) #Tetragonal crystal system #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.83.214519

published as Phys. Rev. B. 83, 214519 (2011) · 6 pages, 4 figures, reformatted and lengthened for Phys. Rev. B regular article

openalex publication_date 2011/06/15 · arxiv created 2011/06/16 · arxiv updated 2011/06/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We report inelastic neutron-scattering measurements of the magnetic excitations in SrFe₂As₂, the parent of a family of iron-based superconductors. The data extend throughout the Brillouin zone and up to energies of ~260 meV. The spectrum calculated from a J₁-J₂ model does not accurately describe our data, and we show that some of the qualitative features that the model fails to describe are readily explained by calculations from a five-band itinerant mean-field model. In particular, the high-energy part of the spectra recorded above T_N do not differ significantly from those at low temperature, which is explained by the itinerant model and which has implications for theories of electronic nematic and orbital ordering.

Citations

• Correlated Electronic Structure ofLaO1−xFxFeAs
• Paramagnetic spin correlations inCaFe2As2single crystals
• High-energy spin excitations inBaFe2As2observed by inelastic neutron scattering
• Theory of itinerant magnetic excitations in the spin-density-wave phase of iron-based superconductors
• Itinerant Magnetic Excitations in AntiferromagneticCaFe2As2
• Theory of electron nematic order in LaFeAsO
• The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides
• Orbital ordering and unfrustrated(π,0)magnetism from degenerate double exchange in the iron pnictides
• Strong Correlations and Magnetic Frustration in the HighTcIron Pnictides
• Effects of magnetism and doping on the electron-phonon coupling inBaFe2As2
• Finite-temperature spin dynamics and phase transitions in spin-orbital models
• High-temperature superconductivity in iron-based materials
• Evidence for weak electronic correlations in iron pnictides
• Signatures of an electronic nematic phase at the isotropic-nematic phase transition

Cited by

• Spin and orbital characters of excitations in iron arsenide superconductors revealed by simulated resonant inelastic x-ray scattering
• Spin dynamics of aJ1-J2-Kmodel for the paramagnetic phase of iron pnictides
• Distinct itinerant spin-density waves and local-moment antiferromagnetism in an intermetallic ErPd2Si2 single crystal
• Phase transitions in spin-orbital models with spin-space anisotropies for iron pnictides: Monte Carlo simulations
• Electron Correlation and Spin Dynamics in Iron Pnictides and Chalcogenides