Phonon raman scattering of (formula presented) under hydrostatic pressure

Minoru Osada, Masato Kakihana

研究成果: Article査読

6 被引用数 (Scopus)

抄録

Phonon Raman scattering from slightly overdoped (Formula presented) samples have been investigated under hydrostatic pressure up to 7.2 GPa. Although most observed phonons harden linearly with increasing pressure, the (Formula presented)-type Cu mode at 140 (Formula presented) exhibits a nonlinear hardening with an inflection point around 2 GPa, similar to the dependence of (Formula presented) versus pressure. We also find that the mode-specific Grüneisen parameters scale inversely with the corresponding vibrational frequencies, a trend similar to what is observed for molecular solids. The data are interpreted in terms of a nonuniform structural compressibility that results in a redistribution of charge carriers within the (Formula presented) unit cell.

本文言語English
ページ(範囲)8447-8450
ページ数4
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
59
13
DOI
出版ステータスPublished - 1999
外部発表はい

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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