Lattice Dynamics of Cubic Mercury Sulphide
W. Szuszkiewicz, K. Dybko, E. Dynowska, J. Górecka, B. Witkowska
Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland

and B. Hennion
Laboratoire Léon Brillouin, CE Saclay, 91191 Gif-sur-Yvette, France
Full Text PDF
The acoustic phonon dispersion of mercury sulphide of zinc-blende structure (β-HgS) was studied by inelastic neutron scattering. The measurements were carried out at 19 K and 295 K on HgS crystals doped with Fe. A slight decrease in phonon frequencies with increasing temperature was found, the temperature dependence being the strongest for LA phonons with [ξ,ξ,0] propagation. From acoustic phonon dispersion the values of selected elastic constants were determined for β-HgS.
DOI: 10.12693/APhysPolA.90.947
PACS numbers: 62.20.Dc, 63.20.-e