Fig. 2
XAS and RIXS spectra and the projected DOS. a, b High-resolution Ta L3-edge a and L2-edge b XAS spectra of GaTa4Se8 measured in the partial yield mode. c, d High-resolution Ta L3-edge c and L2-edge d RIXS spectra as functions of the incident photon energy (E i) and energy loss. Both spectra show the broad excitation over the three −7 eV energy loss. Below 2 eV, the three narrow peaks are clearly visible in the L3-edge RIXS spectra. But the third peak at 1.3 eV is missing in the L2-edge RIXS spectra. e The calculated DOS projected onto Ta-e g (black), Ta-t 2g (cyan) and Se-p (yellow) orbitals. In the region of E F ± 2 eV, the t 2g states are dominant and responsible for the narrow peak excitations noticed in c and d
