Abstract
we study the spin-charge-lattice coupling in 5d relativistic Mott insulators double perovskites by combining theoretical/computational and experimental investigations. The project aims to investigate the coupling between spin, charge, and lattice in osmium-based double perovskite oxides of the 5d family, known as relativistic Mott insulators. These materials exhibit strong spin-orbit interaction and significant electron correlations, giving rise to emergent phenomena such as multipolar magnetic order and Jahn-Teller distortions. The goal is to understand how these interactions generate complex quantum states, through controlled structural and charge modifications via isovalent/heterovalent doping and application of chemical or external pressure. The project combines local spectroscopies (NMR/NQR, muSR) with ab initio simulations to provide a detailed microscopic description of the emergent quantum properties. The project aims to map the magnetic and structural phase diagram, revealing the evolution of multipolar orders and local distortions as a function of doping and pressure. For the first time, the formation of small polarons in a strongly spin-orbit-coupled system is expected to be detected and characterized using NMR/NQR and muSR relaxation techniques. Furthermore, key microscopic parameters (U, J, crystal field splitting, etc.) will be quantified through advanced simulations and compared to experimental results. The project will provide an experimental and theoretical platform to describe emergent phases in quantum materials, with potential relevance for future quantum technologies.
Dettagli del progetto
Responsabile scientifico: Samuele Sanna
Strutture Unibo coinvolte:
Dipartimento di Fisica e Astronomia "Augusto Righi"
Coordinatore:
ALMA MATER STUDIORUM - Università di Bologna(Italy)
Contributo totale di progetto: Euro (EUR) 157.776,00
Contributo totale Unibo: Euro (EUR) 98.700,00
Durata del progetto in mesi: 24
Data di inizio
28/09/2023
Data di fine:
28/02/2026
