Raman Scattering Study of Filled Skutterudite Compounds

被引：7

作者：

Ogita, Norio ^{[1
]}

Kojima, Ryusuke ^{[1
]}

Hasegawa, Takumi ^{[1
]}

Takasu, Yuichi ^{[1
]}

Udagawa, Masayuki ^{[1
]}

Kondo, Toshihisa ^{[2
]}

Narazu, Shouta ^{[3
]}

Takabatake, Toshiro ^{[3
]}

Takeda, Naoya ^{[4
]}

Ishikawa, Yoshikazu ^{[5
]}

Sugawara, Hitoshi ^{[6
]}

Ikeno, Tsuyoshi ^{[7
]}

Kikuchi, Daisuke ^{[7
]}

Sato, Hideyuki ^{[7
]}

Sekine, Chihiro ^{[8
]}

Shirotani, Ichimin ^{[8
]}

机构：

[1] Hiroshima Univ, Grad Sch Integrated Arts & Sci, Hiroshima 7398521, Japan

[2] Hiroshima Univ, Venture Business Lab, Hiroshima 7398527, Japan

[3] Hiroshima Univ, Grad Sch Adv Sci Matter, Hiroshima 7398530, Japan

[4] Niigata Univ, Fac Engn, Niigata 9502181, Japan

[5] Toyama Univ, Fac Sci, Toyama 9308555, Japan

[6] Univ Tokushima, Fac Integrated Arts & Sci, Tokushima 7708502, Japan

[7] Tokyo Metroporitan Univ, Grad Sch Sci, Tokyo 1920397, Japan

[8] Muroran Inst Technol, Fac Engn, Muroran, Hokkaido 0508585, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2008年 / 77卷

关键词：

Raman scattering; filled skutterudite; phonon; rattling mode; resonance Raman scattering;

D O I：

10.1143/JPSJS.77SA.251

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Raman scattering of filled skutterudite compounds RT4X12 (R=La, Ce, Pr, Nd, Sm and Yb, T=Fe, Ru and Os, X=P and Sb) have been measured. All first order Raman active phonons are observed and are assigned as the pnicogen vibrations. In addition, at the low energy region, the 2nd order phonons due to the local vibrations of the rare-earth ions are also observed for RRu4P12 and ROs4Sb12. The appearance of the 2nd order phonon in Raman spectrum is caused by a large amplitude vibration of the rare-earth ion in large cage space. This rare-earth vibration and pnicogen's one, which changes the R-X bond length, show the significant resonance scattering depending on the incident energy except for the semiconductive CeFe4P12. This result suggests the existance of the interaction between the R-X stretching-like vibration and conduction electron.

引用

页码：251 / 253

页数：3

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