Fig. 4
From: Bimagnon dispersion of La2CuO4 probed by resonant inelastic X-ray scattering
Bimagnon dispersion of \(\hbox {La}_{2}\hbox {CuO}_4\) from momentum-dependent Cu L-edge RIXS. (a) Cu L-edge RIXS spectra for various in-plane momentum transfers with incident energy tuned to \(L_3\)+0.6 eV. RIXS spectra are after correction for self-absorption and plotted with vertical offsets for clarity. (b) Energies of magnon and bimagnon extracted from RIXS, along with the energy positions of the maximum intensities in the calculated RIXS spectra with \(\Delta S=0\) (red squares) and 1 (blue squares). Details of self-absorption correction and curve fitting analysis for determining the energy positions are presented in the supplementary material. For comparison, the energy positions of the single magnon from Betto et al.46 and the bimagnon from Forte et al.47 and Guarise et al.48 are also plotted in (b).
