Origin of the Non-Linear Pressure Effects in Perovskite Manganites: Buckling of Mn-O-Mn Bonds and Jahn-Teller Distortion of the MnO6 Octahedra Induced by Pressure

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dc.creatorChen, Z.
dc.creatorTyson, T. A.
dc.creatorAhn, K. H.
dc.creatorZhong, Z.
dc.creatorHu, J.
dc.date2007-08-14
dc.date2008-03-21
dc.date.accessioned2026-07-07T09:27:34Z
dc.date.available2026-07-07T09:27:34Z
dc.descriptionHigh-pressure resistivity and x-ray diffraction have been measured on La0.85MnO3-d. At low pressures the metal-insulator transition temperature (TMI) increases linearly with pressure up to a critical pressure, P* ~ 3.4 GPa, which is followed by reduction of TMI with increasing pressure. Analysis of the bond distances and bond angles reveal that a bandwidth increase drives the in-crease of TMI for pressure below P*. The reduction of TMI at higher pressures is found to result from Jahn-Teller distortions of the MnO6 octahedra. The role of anharmonic interatomic potential is discussed.
dc.description15 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/0708.1963
dc.identifierhttp://arxiv.org/abs/0708.1963
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/157149
dc.subjectMaterials Science
dc.titleOrigin of the Non-Linear Pressure Effects in Perovskite Manganites: Buckling of Mn-O-Mn Bonds and Jahn-Teller Distortion of the MnO6 Octahedra Induced by Pressure
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