Issue
J. Phys. Colloques
Volume 42, Number C6, Décembre 1981
International Conference on Phonon Physics
Page(s) C6-386 - C6-388
DOI https://doi.org/10.1051/jphyscol:19816112
International Conference on Phonon Physics

J. Phys. Colloques 42 (1981) C6-386-C6-388

DOI: 10.1051/jphyscol:19816112

A NEUTRON INELASTIC SCATTERING STUDY OF PHONONS IN METASTABLE BETA-GALLIUM

J.R.D. Copley1, 2, L. Bosio3, R. Cortès3, J. Lefebvre1 et W.D. Teuchert1, 4, 5

1  Institut Laue-Langevin, 156X Centre de Tri, 38042 Grenoble Cedex, France
2  Department of Physics, Mc Master University, Hamilton, Ontario, Canada, L8S 4K1
3  Groupe de Recherche no. 4 du C.N.R.S., Physique des Liquides et Electrochimie, associé à l'Université Paris VI, 4 Place Jussieu, 75230 Paris Cedex 05, France.
4  Fachbereich Physik E21 der Technischen Universität München, 8046 Garching, F.R.G.
5  Carl Zeiss, Postfach 1369/1380, D-7082, Oberkochen, F.R.G.


Abstract
The phonon dispersion curves of C-centred monoclinic beta-gallium at the melting temperature have been measured along five symmetry directions. The behaviour of the lower longitudinally polarised branch in the Ex (Sx) direction suggests a desire to double the size of the unit cell. Initial model fitting calculations indicate that the interactions in ß-Ga are of reasonably long range.