INELASTIC NEUTRON-SCATTERING STUDY OF THE EXTERNAL VIBRATIONS IN SINGLE-CRYSTAL C-60

被引：84

作者：

PINTSCHOVIUS, L

RENKER, B

GOMPF, F

HEID, R

CHAPLOT, SL

HALUSKA, M

KUZMANY, H

机构：

[1] CENS,LAB LEON BRILLOUIN,F-91191 GIF SUR YVETTE,FRANCE

[2] UNIV VIENNA,INST FESTKORPERPHYS,A-1090 VIENNA,AUSTRIA

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.69.2662

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The external vibrations in solid C60 were studied by means of inelastic neutron scattering. The translational spectrum extends to 6 meV at room temperature and hardens by 5% on cooling below T(s). Narrow librational excitations were observed up to temperatures very close to T(s) at energies around 2.4, 3.6, and 4.6 meV. Calculations based on a van der Waals potential give about the correct frequency range for the translations, but frequencies considerably too low for the librations. Bond-charge models give better results only for an unrealistic choice of parameters.

引用

页码：2662 / 2665

页数：4

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