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

doi:10.1103/PhysRevB.102.245150

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

Condensed Matter Physics

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

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 language	English
Article number	245150
Journal	Physical Review B
Volume	102
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevB.102.245150
Publication status	Published - Dec 30 2020

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.102.245150

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title = "Lattice instability coupled with valence degrees of freedom in valence fluctuation compound YbPd",

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.",

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

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T1 - Lattice instability coupled with valence degrees of freedom in valence fluctuation compound YbPd

AU - Tsutsui, Satoshi

AU - Hasegawa, Takumi

AU - Mitsuda, Akihiro

AU - Sugishima, Masaki

AU - Oyama, Kohei

AU - Mizumaki, Masaichiro

AU - Ogita, Norio

AU - Wada, Hirofumi

AU - Udagawa, Masayuki

PY - 2020/12/30

Y1 - 2020/12/30

N2 - 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.

AB - 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.

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

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