Change of phonon Raman spectra with v trimerization in BaV 10O 15

T. Kanzaki, R. Kubota, T. Katsufuji

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We investigated Raman scattering of BaV 10O 15, which exhibits a structural phase transition with V trimerization at T c=123K possibly dominated by the orbital ordering of V t 2g states. It was found that phonon Raman spectra drastically change at T c. According to the analysis of the phonon spectra based on the bond-polarizability model, the force constant of the V-V bond increases by 75% and the peak width is reduced by half below T c. This result can be explained by the existence of disorder originating from orbital degrees of freedom above T c, which is suppressed by the long-range orbital ordering below T c.

Original languageEnglish
Article number144410
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number14
DOIs
Publication statusPublished - 2012 Apr 13

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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