Pressure effects on charge, spin, and metal-insulator transitions in narrow bandwidth manganite Pr$_{1-x}$Ca$_{x}$MnO$_{3}$

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dc.creatorCui, Congwu
dc.creatorTyson, Trevor A.
dc.date2003-11-19
dc.date2003-12-03
dc.date.accessioned2026-07-07T02:54:50Z
dc.date.available2026-07-07T02:54:50Z
dc.descriptionPressure effects on the charge and spin states and the relation between the ferromagnetic and metallic states were explored on the small bandwidth manganite Pr$_{1-x}$Ca$_{x}$MnO$_{3}$ (x = 0.25, 0.3, 0.35). Under pressure, the charge ordering state is suppressed and a ferromagnetic metallic state is induced in all three samples. The metal-insulator transition temperature (T$_{MI}$) increases with pressure below a critical point P*, above which T$_{MI}$ decreases and the material becomes insulating as at the ambient pressure. The e$_{g}$ electron bandwidth and/or band-filling mediate the pressure effects on the metal-insulator transition and the magnetic transition. In the small bandwidth and low doping concentration compound (x = 0.25), the T$_{MI}$ and Curie temperature (T$_{C}$) change with pressure in a reverse way and do not couple under pressure. In the x = 0.3 compound, the relation of T$_{MI}$ and T$_{C}$ shows a critical behavior: They are coupled in the range of $\sim$0.8-5 GPa and decoupled outside of this range. In the x = 0.35 compound, T$_{MI}$ and T$_{C}$ are coupled in the measured pressure range where a ferromagnetic state is present.
dc.identifierhttps://arxiv.org/abs/cond-mat/0311431
dc.identifierhttp://arxiv.org/abs/cond-mat/0311431
dc.identifierPhys. Rev. B 70, 094409 (2004)
dc.identifierdoi:10.1103/PhysRevB.70.094409
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/22721
dc.subjectCondensed Matter
dc.titlePressure effects on charge, spin, and metal-insulator transitions in narrow bandwidth manganite Pr$_{1-x}$Ca$_{x}$MnO$_{3}$
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