Phonon dispersion of β-Sc

W. Petry, J. Trampenau, C. Herzig

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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 languageEnglish
Pages (from-to)881-886
Number of pages6
JournalPhysical Review B
Issue number2
StatePublished - 1993
Externally publishedYes


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