Experimental Specialization Semester in Resonant Inelastic X-Ray Scattering on Quantum Materials

This report is a summary of the physical background and experimental work conducted during the MA3 specialization semester in the autumn semester 2025/2026, focusing on Resonant Inelastic X-ray Scattering (RIXS). Two RIXS experiments on different quantum materials are performed and analyzed. The first study investigates the excitonic insulator candidate GdGaI and its temperature-dependent electronic excitations, aiming to probe potential excitonic signatures. Atomic multiplet calculations were performed to understand the experimental RIXS results. The second study focuses on Sr-doped La3Ni2O7 thin films, where RIXS is used to examine the doping dependence of magnetic and orbital excitations and their connection to superconductivity.