Charge order versus Zener polarons: ferroelectricity in manganites

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We show that in manganites close to half-doping novel non-bipartite magnetic phases appear due to the interplay between double exchange, superexchange and orbital ordering. In considerable part of the phase diagram the groundstate has a magnetic order that is intermediate between the canonical magnetic CE-phase and a state that we identify as the recently observed Zener polaron state. The intermediate phase shows a type of charge ordering that breaks inversion symmetry and is therefore predicted to be ferroelectric.
4 pages, 3 figures

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Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/21694

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0306651
 http://arxiv.org/abs/cond-mat/0306651

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arXiv