| Numéro |
J. Phys. Colloques
Volume 42, Numéro C6, Décembre 1981
International Conference on Phonon Physics
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|---|---|---|
| Page(s) | C6-578 - C6-580 | |
| DOI | https://doi.org/10.1051/jphyscol:19816168 | |
International Conference on Phonon Physics
J. Phys. Colloques 42 (1981) C6-578-C6-580
DOI: 10.1051/jphyscol:19816168
Groupe de Physique Cristalline, E.R.A. au C.N.R.S. n°070015, Université de Rennes, Campus de Beaulieu, 35042 Rennes Cedex, France
J. Phys. Colloques 42 (1981) C6-578-C6-580
DOI: 10.1051/jphyscol:19816168
LINEAR CHAIN MODELS AND SOUND VELOCITIES IN MOLECULAR ORGANIC CRYSTALS
C. EcolivetGroupe de Physique Cristalline, E.R.A. au C.N.R.S. n°070015, Université de Rennes, Campus de Beaulieu, 35042 Rennes Cedex, France
Abstract
Longitudinal sound velocities in crystals of elongated aromatic molecules have been measured by Brillouin scattering and are found to be faithfully described by a simple linear chain model, whereas a similar behaviour is observed for compressibility and thermal expansion. A particular attention has been paid to the p-polyphenyls and polyacenes series.