Recent advancements in the application of the Zaanen–Sawatzky–Allen (ZSA) theory have significantly expanded its scope in a wide range of materials beyond standard 3𝑑 transition metal compounds, from high-temperature superconductors to topological insulators and low-dimensional systems. The combination of computational tools, such as dynamical mean field theory, along with experimental insights, allowed to further refine the theory, making it a valuable framework for classifying and predicting the electronic properties of large classes of complex materials with correlated electrons. Here, we extend the application of the ZSA approach to Ca2RuO4, a widely studied system where, differently from what happens in the transition metal compounds usually analyzed in this context, the relevant excitations close to the Fermi energy involve electrons coming from partially filled 4𝑑 shells, those of ruthenium atoms, rather than 3𝑑 ones.
The compound Ca2RuO4 within the Zaanen–Sawatzky–Allen approach
Alfonso Romano;Giuseppe Cuono;Carmine Autieri;Canio Noce
2025
Abstract
Recent advancements in the application of the Zaanen–Sawatzky–Allen (ZSA) theory have significantly expanded its scope in a wide range of materials beyond standard 3𝑑 transition metal compounds, from high-temperature superconductors to topological insulators and low-dimensional systems. The combination of computational tools, such as dynamical mean field theory, along with experimental insights, allowed to further refine the theory, making it a valuable framework for classifying and predicting the electronic properties of large classes of complex materials with correlated electrons. Here, we extend the application of the ZSA approach to Ca2RuO4, a widely studied system where, differently from what happens in the transition metal compounds usually analyzed in this context, the relevant excitations close to the Fermi energy involve electrons coming from partially filled 4𝑑 shells, those of ruthenium atoms, rather than 3𝑑 ones.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
