PRESSURE DEPENDENCE OF THE ACOUSTIC SHEAR MODE IN GaS BY BRILLOUIN SCATTERING

M Fischer , A. Polian (1, 2, 3) , A Chevy , J C Chervin

1 CNRS - Centre National de la Recherche Scientifique
2 IMPMC - Institut de minéralogie, de physique des matériaux et de cosmochimie
3 SU - Sorbonne Université

The C44 elastic constant of the layer compound GaS was measured up to 0.6 GPa by Brillouin scattering and its pressure derivative was then compared with linear chain model calculations. The measured value of the pressure derivative is 8 + 3 which is in good agreement with the computed value. A comparison of C44 and its pressure derivative with that of other previously measured elastic constants shows a clear separation of the "interlayer" and "intralayer" elastic constants.

Domaines: Physique [physics]

M Fischer, A. Polian, A Chevy, J C Chervin. PRESSURE DEPENDENCE OF THE ACOUSTIC SHEAR MODE IN GaS BY BRILLOUIN SCATTERING. Solid State Communications, 1985. ⟨hal-03059403⟩