W. Koshibae

Differences in optical conductivity between one- and two-dimensional doped nickelates

We study the optical conductivity in doped nickelates, and find the dramatic difference of the spectrum in the gap (

Raman scattering by orbital waves in perovskite LaMnO3

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Electronic structure of the Hubbard and extended Hubbard models: An exact diagonalization study

alt

Magnetic and orbital excitations in manganese oxides

4 eV) between one- (1D) and two-dimensional (2D) nickelates. The difference is shown to be caused by the dependence of hopping integral on dimensionality. The theoretical results explain consistently the experimental data in 1D and n2D nickelates, Y

Spin and orbital orderings in perovskite manganites

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Spin and orbital orderings and their excitations in perovskite Mn oxides

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Spin and orbital excitations in perovskite Mn oxides

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Theory of magnetism in low symmetry crystals: cuprates and nickelates

BaNiO

Origin of the magnetic anisotropy and spin-wave gap in La2CuO4

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