On the nature of the laser irradiation induced reversible softening of phonon modes in C60 single crystals

被引：26

作者：

Meletov, KP

Liarokapis, E

Arvanitidis, J

Papagelis, K

Palles, D

Kourouklis, GA ^{[1
]}

Ves, S

机构：

[1] Aristotelian Univ Salonika, Sch Technol, Div Phys, GR-54006 Salonika, Greece

[2] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Moscow Region, Russia

[3] Natl Tech Univ Athens, Dept Phys, Athens 15780, Greece

[4] Aristotelian Univ Salonika, Dept Phys, GR-54006 Salonika, Greece

来源：

CHEMICAL PHYSICS LETTERS | 1998年 / 290卷 / 1-3期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1016/S0009-2614(98)00495-3

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：

The average temperature rise in the laser excitation spot of the C-60 single crystal has been determined using the Stokes to anti-Stokes integrated peak intensity ratio for the H-g(1) phonon mode. The reversible softening of the A(g)(2) pentagon pinch mode was found to be due to the heating of the sample caused by the laser irradiation, in agreement with experimental results obtained for uniformly heated samples. These findings are in quantitative agreement with results obtained by numerical calculations of the local temperature rise, which indicates the highly non-uniform temperature distribution in the laser excitation spot associated with the small thermal conductivity of solid C-60. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：125 / 130

页数：6

共 23 条

[1] Thermal conductivity of C-60 at pressures up to 1 GPa and temperatures in the 50-300 K range [J].