Spin and orbital exchange interactions from Dynamical Mean Field Theory

Spin and orbital exchange interactions from Dynamical Mean Field Theory

We derive a set of equations expressing the parameters of the magnetic interactions characterizing a strongly correlated electronic system in terms of singleelectron Green’s functions and self-energies. This allows to establish a mapping between the initial electronic system and a spin model including up to quadratic interactions between the effective spins, with a general interaction (exchange...

Mott transition at large orbital degeneracy: Dynamical mean-field theory

S. Florens, A. Georges, G. Kotliar, and O. Parcollet Laboratoire de Physique Théorique, Ecole Normale Supérieure, 24 rue Lhomond, 75231 Paris Cedex 05, France and Laboratoire de Physique des Solides, Université Paris-Sud, Bât. 510, 91405 Orsay, France Center for Materials Theory, Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854 Service de Physique Théorique,...

Dynamical mean-field theory

Exchange parameters of strongly correlated materials: Extraction from spin-polarized density functional theory plus dynamical mean-field theory

Insights From Dynamical Mean Field Theory

We discuss some aspects of the pressure (or interaction) driven Mott transition, in three dimensional transition metal oxides by means of dynamical mean field theory. We isolate the universal properties of the transition from the aspects which depend more on the detailed chemistry of the compounds. In this light we can understand the main differences and the remarkable similarities between the ...