LIGHT-SCATTERING STUDY OF DIMER MODE-DYNAMICS IN KDCO3

Authors
TAKASAKA S TSUJIMI Y YAGI T
Citation
S. Takasaka et al., LIGHT-SCATTERING STUDY OF DIMER MODE-DYNAMICS IN KDCO3, Ferroelectrics, 203(1-4), 1997, pp. 167-178
Citations number
17
Categorie Soggetti
Physics, Condensed Matter","Material Science
Journal title
Ferroelectrics → ACNP
ISSN journal
00150193
Volume
203
Issue
1-4
Year of publication
1997
Pages
167 - 178
Database
ISI
SICI code
0015-0193(1997)203:1-4<167:LSODMI>2.0.ZU;2-B
Abstract
The central peak observed by the light scattering is investigated by t he coupling mechanism between the transverse acoustic mode and a relax ational dimer mode Q(F), which is related to the in-phase fluctuation of (DCO3)(2) dimers, The relaxation time tau of the dimer mode decreas es with lowering temperature to 1.2 x 10(-11) sec at the transition te mperature, This value is two order of magnitude smaller than the value reported by a recent neutron experiment.