Abstract
Momentum dependence of resonant inelastic x-ray scattering (RIXS) in one- (1D) and two-dimensional (2D) copper oxides is examined theoretically. Cu K-edge RIXS spectrum is calculated by using the exact diagonalization techniques on small clusters in 1D and 2D Hubbard models with 1s-core bands. We find that the spectral line shape around the zone boundary is sensitive to the nearest-neighbor Coulomb interaction V. Whereas the anisotropic momentum dependence in the 2D case stressed in the previous work [Phys. Rev. Lett. 80 (1999) 3705] remains irrespective of V.
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