Raman scattering of type-I clathrate compounds

Yuichi Takasu, Takumi Hasegawa, Norio Ogita, Masayuki Udagawa, Marcos A. Avila, Koichiro Suekuni, Toshiro Takabatake

研究成果: Contribution to journalArticle査読

1 被引用数 (Scopus)

抄録

Rattling motion of a guest ion in type-I clathrate compounds has been studied by Raman scattering measurements. The anomalous energy-decrease of guest atom vibration has been observed for Sr8Ga16Si 30-xGex and Ba8Ga16Si 30-xGex as well as A8Ga16Ge 30 with decreasing temperature. This result shows that the 4th order anharmonic potential is also important for the guest-ion motion of Sr- and Ba-clathrates. The energy of the guest mode observed by the Raman scattering is consistent with the Einstein temperature estimated by the specific heat measurements. It is confirmed that the off-center rattling plays an important role to suppress the lattice thermal conductivity.

本文言語英語
ページ(範囲)254-256
ページ数3
ジャーナルjournal of the physical society of japan
77
SUPPL.A
DOI
出版ステータス出版済み - 2008
外部発表はい

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

フィンガープリント 「Raman scattering of type-I clathrate compounds」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル