ON THE ORIGIN OF THE CENTRAL PEAK IN HYDROGEN-BONDED FERROELECTRICS

Authors
WESSELINOWA JM APOSTOLOV AT
Citation
Jm. Wesselinowa et At. Apostolov, ON THE ORIGIN OF THE CENTRAL PEAK IN HYDROGEN-BONDED FERROELECTRICS, Solid state communications, 101(5), 1997, pp. 343-346
Citations number
13
Categorie Soggetti
Physics, Condensed Matter
Journal title
Solid state communications → ACNP
ISSN journal
00381098
Volume
101
Issue
5
Year of publication
1997
Pages
343 - 346
Database
ISI
SICI code
0038-1098(1997)101:5<343:OTOOTC>2.0.ZU;2-6
Abstract
A microscopic theory for the central peak in H-bonded ferroelectrics i s given. We obtain three different mechanisms for the formation of the central peak: a relaxation mechanism, i.e. the transverse soft mode i s coupled to the longitudinal mode; an oscillatory mechanism, i.e. the transverse soft mode is coupled to the phonon mode; the third mechani sm can be treated as an effective coupling between the phonon and the longitudinal modes. Copyright (C) 1996 Elsevier Science Ltd