Optical Signatures of Spin-Orbit Exciton in Bandwidth Controlled Sr${}_2$IrO${}_4$ Epitaxial Films via High-Concentration Ca and Ba Doping

M. Souri, B. H. Kim, J. H. Gruenewald +8

We have investigated the electronic and optical properties of (Sr${}_{1-x}$Ca${}_x$)${}_2$IrO${}_4$ (x= 0 - 0.375) and (Sr${}_{1-y}$Ba${}_y$)${}_2$IrO${}_4$ (y= 0 - 0.375) epitaxial thin-films,…