Localized character of charge excitations for La${}_{2-x}$Sr${}_x$NiO${}_{4+\delta }$ revealed by oxygen $K$-edge resonant inelastic X-ray scattering

Kohei Yamagami, Kenji Ishii, Yasuyuki Hirata +7

We performed a resonant inelastic X-ray scattering (RIXS) study of La${}_{2-x}$Sr${}_x$NiO${}_{4+\delta }$ (LSNO) at the oxygen $K$ edge to investigate the nature of the doped holes with reg…