Competition of charge, orbital, and ferromagnetic correlations in layered manganites - art. no. 132404

Authors
Romero, DB Moritomo, Y Mitchell, JF Drew, HD
Citation
Db. Romero et al., Competition of charge, orbital, and ferromagnetic correlations in layered manganites - art. no. 132404, PHYS REV B, 6313(13), 2001, pp. 2404
Citations number
28
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<2404:COCOAF>2.0.ZU;2-L
Abstract
The competition of charge, orbital, and ferromagnetic interactions in layer ed manganites is investigated by magneto-Raman scattering spectroscopy. We find that the colossal magnetoresistance effect in the layered compounds re sults from the interplay of orbital and ferromagnetic double exchange corre lations. inelastic scattering by charge-order fluctuations dominates the qu asiparticle dynamics in the ferromagnetic-metal state. It is suppressed at low frequencies, consistent with the opening of a charge-density wave pseud ogap.