Lattice instability coupled with valence degrees of freedom in valence fluctuation compound YbPd

Satoshi Tsutsui, Takumi Hasegawa, Akihiro Mitsuda, Masaki Sugishima, Kohei Oyama, Masaichiro Mizumaki, Norio Ogita, Hirofumi Wada, Masayuki Udagawa

Research output: Contribution to journalArticlepeer-review

Abstract

Inelastic x-ray scattering (IXS) was used to examine the valence fluctuation compound YbPd at 300 K in the Γ-X, Γ-M, X-M, and X-R directions. The obtained spectra and determined phonon dispersion relations demonstrate lattice instabilities related to the successive transitions and correlations between phonon spectra and valence degrees of freedom in YbPd. The low-lying branches in the phonon dispersion relations as well as the broadened linewidths of the IXS spectra observed around the longitudinal X point provide supporting evidence of correlation between a valence-lattice interaction and the successive transitions in YbPd. X-ray absorption spectroscopy was also performed in order to discuss correlations between lattice instabilities and Yb valence degrees of freedom in YbPd.

Original languageEnglish
Article number245150
JournalPhysical Review B
Volume102
Issue number24
DOIs
Publication statusPublished - Dec 30 2020

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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