Theoretical Study on Resonant Inelastic X-ray Scattering in Quasi-One-dimensional Cuprates(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)

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We study theoretically the resonant inelastic x-ray scattering in quasi-one-dimensional insulating copper oxides, where the incident photon energy is tuned to the Cu 1s-4p absorption energy. Our attention is focused particularly on the strong momentum-transfer dependence of the spectral shape observed in recent experiments. We describe the antiferromagnetic ground state within the Hartree-Fock theory, and consider charge excitations from the ground state within the random phase approximation. By taking account of the electron correlation effects perturbatively, we obtain the detailed momentum-transfer dependence of the spectra in semiquantitative agreement with the experiments.
2004-07-15