| Numéro |
J. Phys. Colloques
Volume 42, Numéro C6, Décembre 1981
International Conference on Phonon Physics
|
|
|---|---|---|
| Page(s) | C6-537 - C6-539 | |
| DOI | https://doi.org/10.1051/jphyscol:19816157 | |
International Conference on Phonon Physics
J. Phys. Colloques 42 (1981) C6-537-C6-539
DOI: 10.1051/jphyscol:19816157
1 National Technical University, Athens, Greece
2 Max-Planck-Institute for Solid State Research Stuttgart, F.R.G.
J. Phys. Colloques 42 (1981) C6-537-C6-539
DOI: 10.1051/jphyscol:19816157
SIMULATION OF LONG-WAVELENGTH OPTICAL PHONONS BY GENERALIZED INTERNAL STRAINS
E.M. Anastassakis1 et M. Cardona21 National Technical University, Athens, Greece
2 Max-Planck-Institute for Solid State Research Stuttgart, F.R.G.
Abstract
A generalized external force applied to a crystal can introduce new atomic position parameters known as internal strains. Each internal strain may be looked as a "frozen" q ≈ 0 optical phonon of appropriate symmetry. Explicit forms can be worked out for the internal strains produced by any type of force and crystal class. Related crystal parameters can be determined in any case with X-ray diffraction techniques.