PRESSURE-INDUCED PHASE-TRANSITIONS IN C-60 SINGLE-CRYSTALS

被引：19

作者：

MELETOV, KP ^{[1
]}

CHRISTOFILOS, D ^{[1
]}

KOUROUKLIS, GA ^{[1
]}

VES, S ^{[1
]}

机构：

[1] ARISTOTELIAN UNIV THESSALONIKI,DEPT PHYS,SOLID STATE PHYS SECT,GR-54006 THESSALONIKI,GREECE

来源：

CHEMICAL PHYSICS LETTERS | 1995年 / 236卷 / 03期

关键词：

D O I：

10.1016/0009-2614(95)00205-I

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Raman spectra of C-60 single crystals, in the pentagon pinch mode frequency region, have been measured as a function of hydrostatic pressure up to 7.2 GPa at room temperature. The softening of the A(g)(2) and H-g(8) modes in the pressure region up to 0.4 GPa indicate the orientational ordering phase transition from fee to sc structure. The pressure dependence of the intramolecular H-g(7) and A(g)(2) phonon frequencies and their integrated intensities shows the existence of an interaction between these modes above 2.5 GPa, which is connected with the phase transition to the rotation-free orientationally ordered simple cubic phase of C-60 occurring at 2.5 GPa at room temperature.

引用

页码：265 / 270

页数：6

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