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- W192698928 abstract "Charge ordering in ${mathrm{La}}_{2ensuremath{-}x}{mathrm{Sr}}_{x}M{mathrm{O}}_{4}$ ($M=mathrm{Cu}$ and Ni) has been studied by means of unrestricted Hartree-Fock calculations. The present calculations show that, while the vertical charge stripes along the (1,0) direction of the ${mathrm{CuO}}_{2}$ square plane are favored in the cuprates with a charge-transfer energy ensuremath{Delta} $ensuremath{sim}2mathrm{eV},$ the diagonal stripes are stable in the nickelates with ensuremath{Delta} $ensuremath{sim}4mathrm{eV}.$ It has been found that the metal-centered and oxygen-centered stripes are nearly degenerate in energy both in the cuprates and in the nickelates. In the metal-centered diagonal stripe of the nickelates, the coupling between ${mathrm{Ni}}^{2+}$ and ${mathrm{Ni}}^{3+}$ is calculated to be ferromagnetic. The stabilization of the various charge-ordered states by the elongation and tilting of the $M{mathrm{O}}_{6}$ octahedra has also been studied." @default.
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- W192698928 date "1997-11-01" @default.
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- W192698928 title "Hartree-Fock study of charge-ordered states in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>La</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn><mml:mi>−</mml:mi><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Sr</mml:mi></mml:mrow><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>…" @default.
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- W192698928 doi "https://doi.org/10.1103/physrevb.56.11920" @default.
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