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.
| Original language | English |
|---|---|
| Pages (from-to) | 881-886 |
| Number of pages | 6 |
| Journal | Physical Review B |
| Volume | 48 |
| Issue number | 2 |
| DOIs | |
| State | Published - 1993 |
| Externally published | Yes |