Phonon dispersion of β-Sc
- 1 July 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 48 (2) , 881-886
- https://doi.org/10.1103/physrevb.48.881
Abstract
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 β-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 ω structure, and are interpreted as dynamical precursor fluctuations towards the reconstructive phase transitions.Keywords
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