Magnetic Excitations in Square Lattice Iridates: Contrast between Ba${}_2$IrO${}_4$ and Sr${}_2$IrO${}_4$

J. P. Clancy, H. Gretarsson, A. Lupascu +9

We report a resonant inelastic x-ray scattering (RIXS) investigation of ultra-thin epitaxial films of Ba${}_2$IrO${}_4$, and compare their low energy magnetic and spin-orbit excitation…