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- W1979557304 abstract "Polarized Raman-scattering spectra of nonsuperconducting, single-crystalline FeTe are investigated as a function of temperature. We have found a relation between the magnitude of ordered magnetic moments and the linewidth of ${A}_{1g}$ phonons at low temperatures. This relation is attributed to the intermediate spin state ($S$ $=$ 1) and the orbital degeneracy of Fe ions. Spin-phonon coupling constants have been estimated based on microscopic modeling using density functional theory and analysis of the local spin density. Our observations show the importance of orbital degrees of freedom for Fe-based superconductors with large ordered magnetic moments, while the small magnetic moment of Fe ions in some iron pnictides reflects the low spin state of Fe ions in those systems." @default.
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- W1979557304 date "2011-06-27" @default.
- W1979557304 modified "2023-10-15" @default.
- W1979557304 title "Anomalous optical phonons in FeTe chalcogenides: Spin state, magnetic order, and lattice anharmonicity" @default.
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- W1979557304 doi "https://doi.org/10.1103/physrevb.83.245127" @default.
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