Pressure dependence of phonons in Rb4C60 studied with Raman spectroscopy

被引：4

作者：

Bellin, Ch. ^{[1
]}

Chervin, J. C. ^{[1
]}

Herold, C. ^{[2
]}

Bendiab, N. ^{[1
,3
]}

机构：

[1] Univ Paris 06, Inst Mineral & Phys Mat Condensee, CNRS, UMR 7590, F-75252 Paris 05, France

[2] Univ Nancy 1, Lab Chim Solide Mineral, F-54506 Vandoeuvre Les Nancy, France

[3] Univ Grenoble 1, Spectrometrie Phys Lab, F-38402 St Martin Dheres, France

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 24期

关键词：

D O I：

10.1103/PhysRevB.77.245409

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Raman spectra of Rb4C60 have been measured as a function of pressure up to 8 GPa at room temperature. Intramolecular modes exhibit three remarkable changes around 0.6, 1.7, and 4 GPa. An increase in the pressure slopes of various mode frequencies occurs at 0.6 GPa. Then an overall decrease in the pressure slopes occurs around 1.7 GPa. Finally, we observe the new lines appearing around 4 GPa. These effects are discussed in terms of reduction in the symmetry of the C-60 molecule and electron hopping.

引用

页数：6

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