PHONON-DISPERSION OF BETA-SC

被引：19
作者：
PETRY, W [1 ]
TRAMPENAU, J [1 ]
HERZIG, C [1 ]
机构：
[1] UNIV MUNSTER,INST MET FORSCH,W-4400 MUNSTER,GERMANY
来源：
PHYSICAL REVIEW B | 1993年 / 48卷 / 02期
关键词：
D O I：
10.1103/PhysRevB.48.881
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The phonon dispersion has been measured in the high-temperature bcc phase of a group-III metal (one d electron). In spite of its simple monatomic Bravais lattice the vibrational behavior of beta-Sc is very anisotropic: a valley of low-energy and strongly damped phonons extends along the Brillouin-zone surface. These large-amplitude vibrations displace the lattice towards the stacking sequence of the low-temperature hcp phase and the hitherto unobserved omega structure, and are interpreted as dynamical precursor fluctuations towards the reconstructive phase transitions.
引用
收藏
页码：881 / 886
页数：6
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