Abstract
The phonon dispersion of the high-temperature bcc phase of Hf has been measured. The dispersion resembles very much those of the other group-IV metals: bcc Ti and bcc Zr. It is dominated by the low-energy L 2/3(1,1,1) mode and by the low-energy T1 [0] phonon branch with transverse [110] polarization. These large-amplitude vibrations displace the lattice toward the stacking sequence of the high-pressure structure and the low-temperature hcp structure, respectively, and are interpreted as dynamical precursor fluctuations toward these low-symmetry phases within the high-symmetry bcc phase.
Original language | English |
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Pages (from-to) | 10963-10969 |
Number of pages | 7 |
Journal | Physical Review B |
Volume | 43 |
Issue number | 13 |
DOIs | |
State | Published - 1991 |
Externally published | Yes |