Spin and mixed spin-and-orbital excitations in LaMnO3

We investigate the stability of antiferromagnetic phases at Hund's exchange coupling between two eg electrons JH=0 in a model of LaMnO3, and derive spin and mixed spin-and-orbital excitations for either x2-y2 or 3z2-r2 orbitals occupied. It is found that the superexchange due to t2g electron ex...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2006-05, Vol.378-80, p.552-553
Main Authors: SIKORA, Olga, OLES, Andrzej M
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Magnetotransport phenomena, materials for magnetotransport
Manganites
Physics
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Summary:We investigate the stability of antiferromagnetic phases at Hund's exchange coupling between two eg electrons JH=0 in a model of LaMnO3, and derive spin and mixed spin-and-orbital excitations for either x2-y2 or 3z2-r2 orbitals occupied. It is found that the superexchange due to t2g electron excitations and the charge transfer processes in the superexchange remove the divergence of quantum corrections and stabilize both ordered phases.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2006.01.449