2009/03/31 by E.Z. Kurmaev, E. Z. Kurmaev, J. McLeod +8 · 2 citations
Business, Management and Accounting · Materials Science · Physics and Astronomy · #Atomic physics #Condensed matter physics #Corporate Taxation and Avoidance #Density functional theory #Density of states #Electron #Electronic structure #Excited state #Fermi level #Inelastic neutron scattering #Inelastic scattering #Iron-based superconductors research #Materials science #Nuclear physics #Optics #Physics #Quantum mechanics #Rare-earth and actinide compounds #Resonant inelastic X-ray scattering #Scattering #Spectral line #Spectroscopy #Superconductivity #Valence (chemistry) #cond-mat.supr-con
paper · pdf · doi:10.1088/0953-8984/21/34/345701
published as 2009 J. Phys.: Condens. Matter 21 345701 · 11 pages, 6 figures
arxiv created 2009/07/17 · openalex publication_date 2009/08/06 · arxiv updated 2012/01/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Resonant x-ray emission spectroscopy (XES) measurements at Fe L(2,3) edges and electronic structure calculations for LiFeAs and NaFeAs are presented. Experiment and theory show that in the vicinity of the Fermi energy, the density of states is dominated by contributions from Fe 3d states. The comparison of Fe L(2,3) XES with spectra of related FeAs compounds reveals similar trends in energy and the ratio of intensities of the L(2) and L(3) peaks (I(L(2))/I(L(3)) ratio). The I(L(2))/I(L(3)) ratio for all FeAs-based superconductors is found to be closer to that of metallic Fe than that of the strongly correlated FeO. We conclude that iron-based superconductors are weakly or, at most, moderately correlated systems.