Features of the shape of Raman spectra of disordered ferroelectrics

Authors
Glinchuk, MD Kondakova, IV
Citation
Md. Glinchuk et Iv. Kondakova, Features of the shape of Raman spectra of disordered ferroelectrics, PHYS SOL ST, 43(7), 2001, pp. 1307-1313
Citations number
14
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICS OF THE SOLID STATE
ISSN journal
10637834 → ACNP
Volume
43
Issue
7
Year of publication
2001
Pages
1307 - 1313
Database
ISI
SICI code
1063-7834(2001)43:7<1307:FOTSOR>2.0.ZU;2-4
Abstract
A theory of the shape of the first-order Raman scattering (FORS) line is de veloped in which nonlinear and correlation effects in inhomogeneous broaden ing and the dynamic mechanism of homogeneous broadening are taken into acco unt. It is shown that the FORS band generally has two peaks and that the sh ape of the low-frequency peak is determined by homogeneous broadening. Our theory provides an explanation for the features of the observed FORS band o f the hard TO2 mode in KLT and KTN with various concentrations of Li and Nb ions. (C) 2001 MAIK "Nauka/Interperiodica".