Observation of spin-orbit excitations and Hund's multiplets in Ca${}_2$RuO${}_4$

H. Gretarsson, H. Suzuki, Hoon Kim +6

We use Ru $L_3$-edge (2838.5 eV) resonant inelastic x-ray scattering (RIXS) to quantify the electronic structure of Ca${}_2$RuO${}_4$, a layered $4d$-electron compound that exhibits a…