| Numéro |
J. Phys. Colloques
Volume 42, Numéro C6, Décembre 1981
International Conference on Phonon Physics
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|
|---|---|---|
| Page(s) | C6-323 - C6-325 | |
| DOI | https://doi.org/10.1051/jphyscol:1981694 | |
International Conference on Phonon Physics
J. Phys. Colloques 42 (1981) C6-323-C6-325
DOI: 10.1051/jphyscol:1981694
1 Département de Physique, Université de Sherbrooke, Sherbrooke, Québec, Canada, J1K 2R1.
2 Département de chimie, Collège militaire royal, St-Jean, Québec, Canada.
3 Max-Planck-Institut für Festkorperforschung, 7000 Stuttgart 80, F.R.G.
4 Ludwig Boltzmann Institut für festkorperforschung, and Institut für festkorperphysik der Universität Wien, Wien, Austria.
J. Phys. Colloques 42 (1981) C6-323-C6-325
DOI: 10.1051/jphyscol:1981694
GAS PHASE RAMAN SPECTRUM OF TCNQ AND PRESSURE DEPENDENCE OF THE MODES IN CRYSTALS OF TNCQ°
C. Carlone1, N.K. Hota2, H.J. Stolz3, M. Elbert4, H. Kuzmany4 et H.D. Hochheimer31 Département de Physique, Université de Sherbrooke, Sherbrooke, Québec, Canada, J1K 2R1.
2 Département de chimie, Collège militaire royal, St-Jean, Québec, Canada.
3 Max-Planck-Institut für Festkorperforschung, 7000 Stuttgart 80, F.R.G.
4 Ludwig Boltzmann Institut für festkorperforschung, and Institut für festkorperphysik der Universität Wien, Wien, Austria.
Abstract
The Raman spectrum of gaseous TCNQ was obtained. Vibrations were detected at 40, 76, 145, 340, 1225, 1454, 1606 and 2230 (± 2) cm-1. The pressure dependence of the Raman modes in crystals of TCNQ, TTF, K(TCNQ), CS2(TCNQ)3 perylene-TCNQ and phenazine-TCNQ, were obtained in a diamond cell in the pressure range 0 to 70 Kbar. The mode Gruneisen parameter were found to span several orders of magnitude. It is concluded that all of the observed low frequency modes in this class of compounds are mixed modes of internal and external characters.