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

页码：881 / 886

页数：6

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