High-Pressure Phase Diagram in the Manganites: a Two-site Model Study

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dc.creatorSacchetti, A.
dc.creatorPostorino, P.
dc.creatorCapone, M.
dc.date2004-02-10
dc.date.accessioned2026-07-07T08:30:33Z
dc.date.available2026-07-07T08:30:33Z
dc.descriptionThe pressure dependence of the Curie temperature $T_C$ in manganites, recently studied over a wide pressure range, is not quantitatively accounted for by the quenching of Jahn-Teller distortions, and suggests the occurrence of a new pressure-activated localizing processes. We present a theoretical calculation of $T_C$ based on a two-site double-exchange model with electron-phonon coupling interaction and direct superexchange between the $% t_{2g}$ core spins. We calculate the pressure dependence of $T_C$ and compare it with the experimental phase diagram. Our results describe the experimental behavior quite well if a pressure-activated enhancement of the antiferromagnetic superexchange interaction is assumed.
dc.identifierhttps://arxiv.org/abs/cond-mat/0402279
dc.identifierhttp://arxiv.org/abs/cond-mat/0402279
dc.identifierNew J Phys 8, 3 (2006)
dc.identifierdoi:10.1088/1367-2630/8/1/003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/138268
dc.subjectStrongly Correlated Electrons
dc.titleHigh-Pressure Phase Diagram in the Manganites: a Two-site Model Study
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