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Spin-orbit interaction in Sr$_2$IrO$_4$ leads to the realization of the$J_{\mathrm{eff}}$ = 1/2 state and also induces an insulating behavior. Usinglarge-shift Raman spectroscopy, we found two high-energy excitations of thed-shell multipletat at 690 meV and 680 meV with $A_{1g}$ and $B_{1g}$ symmetryrespectively. As temperature decreases, the $A_{1g}$ and $B_{1g}$ peaks narrow,and the $A_{1g}$ peak shifts to higher energy while the energy of the $B_{1g}$peak remains the same. When 25$\%$ of Ir is substituted with Rh the $A_{1g}$peak softens by 10$\%$ but the $B_{1g}$ peak does not. We show that bothpseudospin-flip and non-pseudosin-flip dd electronic transitions are Ramanactive, but only the latter are observed.

High-energy electronic excitations in Sr$_2$IrO$_4$ observed by Raman scattering