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Kurmaev, E.Z.; McLeod, John A.; Buling, Anna; Skorikov, N. A.; Moewes, A.; Neumann, M.; Korotin, M. A.; Izyumov, Yu. A.; Ni, N.; Canfield, Paul C.

doi:10.1103/physrevb.80.054508

Cited by 34 publications

(47 citation statements)

References 31 publications

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“…As in the pnictide Fe-HTSC, the Fe 2p PES and Fe L 23 XAS spectra display signatures which are typical of delocalized, itinerant electrons, in agreement with other studies [29,30]. Specifically, …”

supporting

confidence: 74%

Spectroscopic evidence for strong quantum spin fluctuations with itinerant character inYFe2Ge2

et al. 2015

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We report x-ray absorption and photoemission spectroscopy of the electronic structure in the normal state of metallic YFe2Ge2. The data reveal evidence for large fluctuating spin moments on the Fe sites, as indicated by exchange multiplets appearing in the Fe 3s core level photoemission spectra, even though the compound does not show magnetic order. The magnitude of the multiplet splitting is comparable to that observed in the normal state of the Fe-pnictide superconductors. This shows a connection between YFe2Ge2 and the Fe-based superconductors even though it contains neither pnictogens nor chalcogens. The implication is that the chemical range of compounds showing at least one of the characteristic magnetic signatures of the Fe-based superconductors is broader than previously thought.

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supporting

confidence: 74%

Spectroscopic evidence for strong quantum spin fluctuations with itinerant character inYFe2Ge2

et al. 2015

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“…18,19,20 Absorption and emission studies on the Fe L 2,3 edges also are in agreement with weak electronic correlations, and can be simply matched to the unoccupied d DOS determined from DFT calculations. However calculations pertinent to the XAS process, where core holes are created, and the emission process, where photons are emitted from the valence states in the presence of a core hole, have not been carried out.…”

supporting

confidence: 66%

“…18 and 122 compounds 20 . As XAS has been demonstrated to be a powerful tool for probing the crystal field and electronic interactions for 3d metals 28,29,30 ; the non-splitting XAS structure indicates a weak crystal field effect 31 that favors high-spin ground states.…”

Section: Xas and Rixs Measurementsmentioning

confidence: 99%

Evidence for weak electronic correlations in iron pnictides

et al. 2009

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Using x-ray absorption and resonant inelastic x-ray scattering, charge dynamics at and near the Fe L edges is investigated in Fe pnictide materials, and contrasted to that measured in other Fe compounds. It is shown that the XAS and RIXS spectra for 122 and 1111 Fe pnictides are each qualitatively similar to Fe metal. Cluster diagonalization, multiplet, and density-functional calculations show that Coulomb correlations are much smaller than in the cuprates, highlighting the role of Fe metallicity and strong covalency in these materials. Best agreement with experiment is obtained using Hubbard parameters U 2eV and J ≈ 0.8eV.

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“…Figure 7 (c) displays a deconvoluted spectrum that includes a single dominant line (C1) and a low-energy contribution (C2), which is consistent with published x-ray data (Freelon et al, 2010). The main line is associated primarily with Fe 3d bands; in addition, the contribution in the low-energy region is interpreted as originating from the hybridization of Fe 3d and Se 4p states (Kurmaev et al, 2009 indicate that the FeSe "11" system is simpler than the "1111" system: the low-energy contribution therefore originates from hybridization of Fe 3d-Se 4p without calculation forecasts. This hybridization of Fe 3d-Se 4p i s a l s o c o n s i s t e n t w i t h r e c e n t d e n s i t y functional calculations (Subede et al, 2008).…”

Section: Electron Correlations Of Fese1-yteysupporting

confidence: 68%