High-pressure Raman study of the potassium-doped silicon clathrate K8Si46 -: art. no. 052101

被引：40

作者：

Kume, T

Koda, T

Sasaki, S

Shimizu, H

Tse, JS

机构：

[1] Gifu Univ, Fac Engn, Dept Mat Sci & Technol, Gifu 5011193, Japan

[2] Gifu Univ, Grad Sch Engn, Gifu 5011193, Japan

[3] Natl Res Council Canada, Steacie Inst Mol Sci, Ottawa, ON K1A 0R6, Canada

来源：

PHYSICAL REVIEW B | 2004年 / 70卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.70.052101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Pressure-induced phase transition and vibrational properties of K doped type I Si clathrate are investigated at high pressures up to 23 GPa by Raman spectroscopy. Vibrations related to K in the Si cages are observed by low-frequency Raman measurements. The high-pressure Raman measurements reveal the spectral changes associated with phase transitions around 5-8 GPa and at 20 GPa. We investigate the mechanisms of these phase transitions and the volume dependence of the vibrational modes.

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页码：052101 / 1

页数：4

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