| Numéro |
J. Phys. Colloques
Volume 42, Numéro C6, Décembre 1981
International Conference on Phonon Physics
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|
|---|---|---|
| Page(s) | C6-776 - C6-778 | |
| DOI | https://doi.org/10.1051/jphyscol:19816229 | |
International Conference on Phonon Physics
J. Phys. Colloques 42 (1981) C6-776-C6-778
DOI: 10.1051/jphyscol:19816229
1 Dipartimento di Fisica e Unità G.N.S.M. - C.N.R., Trento, Italy
2 Istituto per la Ricerca Scientifica e Tecnologica, Trento, Italy
3 Istituto di Fisica e Unità G.N.S.M. - C.N.R., Parma, Italy
J. Phys. Colloques 42 (1981) C6-776-C6-778
DOI: 10.1051/jphyscol:19816229
OBSERVATION OF PRETRANSITIONAL EFFECTS ON THE SHAPE OF THE E2 (17 cm-1 ) OPTICAL MODE IN β-Ag1 BY RAMAN SPECTROSCOPY
E. Cazzanelli1, A. Fontana1, G. Mariotto1, F. Rocca2 et M.P. Fontana31 Dipartimento di Fisica e Unità G.N.S.M. - C.N.R., Trento, Italy
2 Istituto per la Ricerca Scientifica e Tecnologica, Trento, Italy
3 Istituto di Fisica e Unità G.N.S.M. - C.N.R., Parma, Italy
Abstract
Resonance interference between the E2(17 cm-1) optical mode and the continuum of one-phonon density of state has been observed in β-AgI. From a fitting of the E2 optical mode shape with a "Fano" formula we have obtained the temperature behaviour of the coupling parameter q and the true half-width which show substantial change near the β→α transition temperature.