SOFT MODE RAMAN-SPECTROSCOPY STUDIES ON CTA SINGLE-CRYSTAL

Authors
GUO AR KATIYAR RS TU CS GUO RY BHALLA AS
Citation
Ar. Guo et al., SOFT MODE RAMAN-SPECTROSCOPY STUDIES ON CTA SINGLE-CRYSTAL, Ferroelectrics. Letters section, 23(1-2), 1997, pp. 13-18
Citations number
14
Categorie Soggetti
Physics, Condensed Matter
Journal title
Ferroelectrics. Letters section → ACNP
ISSN journal
07315171
Volume
23
Issue
1-2
Year of publication
1997
Pages
13 - 18
Database
ISI
SICI code
0731-5171(1997)23:1-2<13:SMRSOC>2.0.ZU;2-P
Abstract
Raman studies in the low frequency region (<100cm(-1)) as a function o f temperature, has been undertaken on single crystal of cesium titanyl arsenate (CTA). A soft mode like behavior for the lowest optic phonon for A(1) symmetry has been observed. Temperature dependence of the mo de intensity and the frequency shift suggest the possible coupling of the soft optical mode with the acoustic mode, The present results, giv e the first strong proof of ferroelectric nature a crystal of the KTP family.