Polaron Exchange Model for Ferromagnetic Ordering in Manganite Films

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dc.creatorChen, Liping
dc.creatorMa, Yubin
dc.creatorSong, Xianfeng
dc.creatorLian, Guijun
dc.creatorXiong, Guangcheng
dc.date2008-12-15
dc.date.accessioned2026-07-07T12:12:51Z
dc.date.available2026-07-07T12:12:51Z
dc.descriptionIn doped manganites, the strong electron-phonon coupling due to the Jahn-Teller effect localizes the conduction-band electrons as polarons. This results in polarons are carriers responsible for transport and ferromagnetic ordering rather than the bare eg electrons, and sequentially polaron exchange model is emerged for describing ferromagnetic ordering. In Pr0.7(Sr1-xCax)0.3MnO3(x=0.3-0.6) epitaxial thin films, for higher-temperature paramagnetic state and lower-temperature ferromagnetic state, both the temperature dependent transports present behaviors of small polaron; for paramagnetic-ferromagnetic transition, the experimental data of Curie temperature are well described by an energy balance expression induced by polaron exchange model. These results demonstrate that the polaron models are proper ways to describe the strongly correlated electrons in the doped manganites.
dc.description8 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/0812.2722
dc.identifierhttp://arxiv.org/abs/0812.2722
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/210677
dc.subjectStrongly Correlated Electrons
dc.subjectOther Condensed Matter
dc.titlePolaron Exchange Model for Ferromagnetic Ordering in Manganite Films
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