Jahn-Teller distortion induced charge-ordering in CE phase of manganites

Abstract

The charge order of CE phase in half-doped manganites is studied, based on an argument that the charge-ordering is caused by the Jahn-Teller distortions of MnO6 octahedra rather than Coulomb repulsion between electrons. The uantitative calculation on the ferromagnetic zigzag chain as the basic structure unit of CE phase within the framework of two-orbital double exchange model including Jahn-Teller effect is performed, and it is shown that the charge-disproportionation of Mn cations in the charge-ordered CE phase is less than 13%. In addition, we predict the negative charge-disproportionation once the Jahn-Teller effect is weak enough.

arXiv comment12 pages, 4 figures(contained in the pdf file). submitted to Physical Review B

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• The Distinct Effects of Homogeneous Weak Disorder and Dilute Strong Scatterers on Phase Competetion in the Manganites
• Non-magnetic B-site Impurities Induce Ferromagnetic Tendencies in CE Manganites
• Melting of magnetic correlations in charge-orbital ordered La(0.5)Sr(1.5)MnO(4) : competition of ferro and antiferromagnetic states
• Relationship between orbital structure and lattice distortions: CE phase of manganites, revisited
• Magnetic orders of LaTiO${}_3$ under epitaxial strain: a first-principles study
• Phase equilibrium in two orbital model under magnetic field
• Topological end states in two-orbital double-exchange model for colossal magnetoresistive manganites