Numerical study of resonant inelastic X-ray scattering at the oxygen $K$-edge in insulating cuprates

Yukihiro Matsubayashi, Sumio Ishihara

We investigate resonant inelastic X-ray scattering (RIXS) at the O $K$-edge in insulating cuprates by means of three methods: cluster perturbation theory (CPT), Hartree--Fock appro…