DETERMINATION OF THE A1(TO) SOFT-MODE DAMPING RATE IN KTA0.93NB0.07O3

Authors
GRENIER P HOUDE D JANDL S BOATNER LA
Citation
P. Grenier et al., DETERMINATION OF THE A1(TO) SOFT-MODE DAMPING RATE IN KTA0.93NB0.07O3, Canadian journal of physics, 72(1-2), 1994, pp. 40-43
Citations number
16
Categorie Soggetti
Physics
Journal title
Canadian journal of physics → ACNP
ISSN journal
00084204
Volume
72
Issue
1-2
Year of publication
1994
Pages
40 - 43
Database
ISI
SICI code
0008-4204(1994)72:1-2<40:DOTASD>2.0.ZU;2-5
Abstract
Raman-scattering and infrared reflectivity experiments were conducted using a KTa0.93Nb0.07O3 single crystal with a ferroelectric phase tran sition temperature of T(c) almost-equal-to 68 K. The values obtained f or the damping rate of the A1(TO(transverse optical)) soft-mode appear to be half of those determined by impulsive stimulated Raman scatteri ng. Since the latter experiment probes the soft-mode in the polariton regime, while the former probes outside of this region, the observed d iscrepancy points towards some additional interaction for the polarito n soft-mode.