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Updated: Jan 27, 2026

Elemental-sensitive Detection of the Chemistry in Batteries through Soft X-ray Absorption Spectroscopy and Resonant Inelastic X-ray Scattering
Published on: April 17, 2018
Lattice dynamics in FeSi measured by inelastic x-ray scattering
G A Valkovskiy1,2, A A Mistonov1, M B Smirnov1
1Saint Petersburg State University, 7/9 Universitetskaya nab., Saint-Petersburg 199034, Russia.
None:
The phonon dispersion of FeSi was measured by inelastic x-ray scattering. The study of its temperature evolution in the range of 100 K-300 K showed that the phonon modes soften to a different extent. The phonons exhibiting specifically strong softening were revealed to belong to the weakly dispersive optical branch. At the same time, the calculations of the lattice dynamics of FeSi suggest that this branch corresponds mainly to the atomic displacements that change the Fe-Fe nearest neighbor distance. It points to the role of the Fe-Fe interaction in the phonon softening.
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