Description and purpose
We study the spin-charge-lattice coupling in 5d relativistic Mott insulators double perovskites by combining theoretical/computational and experimental investigations
Purpose
Investigate the coupling between spin, charge, and lattice in relativistic Mott insulators osmium-based double perovskite oxides. They exhibit strong spin-orbit interaction, giving rise to emergent multipolar magnetic order. We introduce controlled structural and charge modifications via isovalent/heterovalent doping to detect emergent complex quantum states by means of local spectroscopies (NMR/NQR, muSR) and obtain its description by ab initio simulations.
Expected results
Map the magnetic and structural phase diagram, revealing multipolar orders and local distortions as a function of doping and pressure. The project will provide an experimental and theoretical platform to describe emergent phases in quantum materials, with potential relevance for future quantum technologies.
Achieved results
For the first time, the formation of small polarons in a strongly spin-orbit-coupled system is detected and characterized using NMR/NQR and muSR relaxation techniques. Furthermore, key microscopic parameters (U, J, crystal field splitting, etc.) have been quantified through advanced simulations and compared to experimental results.
