PHONON EIGENVECTORS IN SI DETERMINED BY INELASTIC NEUTRON-SCATTERING

被引:27
|
作者
STRAUCH, D
MAYER, AP
DORNER, B
机构
[1] UNIV MUNSTER, W-4400 MUNSTER, GERMANY
[2] INST MAX VON LAUE PAUL LANGEVIN, F-38042 GRENOBLE, FRANCE
来源
关键词
D O I
10.1007/BF01313321
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
We have determined the eigenvectors of longitudinal phonons with wavevectors in the Λ direction in Si at 12 K from inelastic neutron scattering intensities. The eigenvectors obtained from different model and quantum-mechanical calculations are at variance. Comparison of experimental and theoretical results shows that of the various theoretical predictions the ones from the bond-charge model are in best agreement with experiment. Internal-strain constants from these models and from experiment are compared. © 1990 Springer-Verlag.
引用
收藏
页码:405 / 410
页数:6
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