Lattice dynamics of LaMnO3: Coupling of the lattice and orbital degrees offreedom

Authors
Nikiforov, AE Popov, SE
Citation
Ae. Nikiforov et Se. Popov, Lattice dynamics of LaMnO3: Coupling of the lattice and orbital degrees offreedom, PHYS SOL ST, 43(6), 2001, pp. 1132-1140
Citations number
20
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICS OF THE SOLID STATE
ISSN journal
10637834 → ACNP
Volume
43
Issue
6
Year of publication
2001
Pages
1132 - 1140
Database
ISI
SICI code
1063-7834(200106)43:6<1132:LDOLCO>2.0.ZU;2-#
Abstract
The lattice dynamics of regular LaMnO3 is calculated within a shell model w ith pairwise interionic interaction potentials and with a Jahn-Teller (JT) contribution included into the energy and dynamic matrix of the crystal. A correlation is made between Raman spectral lines and lattice vibrations. Th e positions of some lines in the Raman spectrum are found to depend heavily on the linear JT coupling constant V-e. The effect of the JT coupling on t he phonon density of states of LaMnO3 is investigated. (C) 2001 MAIK "Nauka /Interperiodica".