Fig. 2: RIXS and X-ray absorption spectra.
From: Coincident onset of charge order and pseudogap in a homogeneous high-temperature superconductor
a RIXS spectra of Y124 taken at T = 80 K for various momenta along the K axis. b Momentum dependence of the quasielastic intensity, defined as the RIXS intensity integrated in an energy window of width ±100 meV around zero energy loss. c XAS profile (gray line), and RIXS quasielastic intensity (red and blue points). The XAS and RIXS data were taken at room temperature and 80 K, respectively. Both XAS and RIXS intensities were normalized to their maximum values in the measured energy range. The main absorption peaks of Cu1 and Cu2 for 3d9, \(3{d}^{9}\underline{L}\), and 3d10 configurations are indicated by vertical bars30. Inset: RIXS spectra at (H, K) = (0, −0.32) with incident photon energies of 931.46 eV (resonant, red) and 934.2 eV (off-resonant, blue). d Color map of the RIXS quasielastic intensity as a function of the momentum components K and L.
