O(Mn) vibrational bands in double-layered manganites: First and second order Raman scattering - art. no. 132406

Authors
Pantoja, AE Trodahl, HJ Fainstein, A Pregliasco, RG Buckley, RC Balakrishnan, G Lees, MR Paul, DM
Citation
Ae. Pantoja et al., O(Mn) vibrational bands in double-layered manganites: First and second order Raman scattering - art. no. 132406, PHYS REV B, 6313(13), 2001, pp. 2406
Citations number
34
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6313
Issue
13
Year of publication
2001
Database
ISI
SICI code
0163-1829(20010401)6313:13<2406:OVBIDM>2.0.ZU;2-I
Abstract
The Raman spectra of a number of the colossal magnetoresistance manganites and related systems are shown to display strong broad vibrational bands in both first and second order. The modes derive from the entire phonon branch involving the vibration of the oxygen ions in the MnO2 planes, ions which participate in Jahn-Teller displacements. The strength and temperature depe ndence of the second-order signal are shown to follow from conventional res onance scattering; they do not support the model that invokes Frank-Condon scattering.