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Nomura, Takuji; Igarashi, Junichi*
Journal of the Physical Society of Japan, 73(7), p.1677 - 1680, 2004/07
Times Cited Count:26 Percentile:73.61(Physics, Multidisciplinary)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 Cu1-4 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 detailed momentum-transfer dependence of the spectra in a semiquantitative agreement with the experiments.