Raman scattering in hcp rare gas solids under pressure

被引：28

作者：

Freiman, Yu. A. ^{[1
]}

Goncharov, Alexander F. ^{[2
]}

Tretyak, S. M. ^{[1
]}

Grechnev, A. ^{[1
]}

Tse, John S. ^{[3
]}

Errandonea, D. ^{[4
]}

Mao, Ho-Kwang ^{[2
]}

Hemley, Russell J. ^{[2
]}

机构：

[1] Natl Acad Sci Ukraine, B Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine

[2] Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA

[3] Univ Saskatchewan, Dept Phys & Engn Phys, Saskatoon, SK S7N 5E2, Canada

[4] Univ Valencia, Dept Fis Aplicada ICMUV, E-46100 Burjassot, Spain

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.78.014301

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present Raman measurements of hcp rare gas solids (RGSs) at megabar pressures together with lattice dynamics calculations. The E(2g) phonon was measured in Xe up to metallization near 135 GPa and in Ar up to 58 GPa. A comparative analysis of first-principles and semiempirical calculations shows that three-body forces contribute to the energetics at low pressures and that at volume compressions greater than similar to 2.6 higher-order many-body forces become important. The distinct behavior of He under pressure relative to that of the rest of the RGS family is discussed.

引用

页数：5

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