Konwersatorium im. Leopolda Infelda

The magnetism of materials is closely connected to correlated behavior ofelectrons. In many transition metal oxides ordered or disordered magneticlocal moments exist over a broad range of parameters. The process ofsudden change of the magnitude of the local moments, often due to applied pressure, is called spin-state transitions and often is accompanied by dramatic changes of other physical properties, e.g. metal-insulatortransition. I will present several case studies of spin-state transition(MnO, F2O3, FeO, LaCoO3) using the dynamical mean-field theory and discuss the general picture that emerges from them.