Mobile orbitons in Ca${}_2$CuO${}_3$: crucial role of the Hund's exchange

Roberto Fumagalli, Jonas Heverhagen, Davide Betto +9

We investigate the Cu $L_3$ edge resonant inelastic x-ray scattering (RIXS) spectra of a quasi-1D antiferromagnet Ca${}_2$CuO${}_3$. In addition to the magnetic excitations, which are…