Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 39: Focussed session: Frontiers of electronic structure theory: Strong correlations from first principles III (jointly with TT)
O 39.4: Vortrag
Mittwoch, 28. März 2012, 11:15–11:30, HE 101
Interplay of Coulomb interactions and spin-orbit coupling in the bilayer Ruthenate Sr3Ru2O7 — •Malte Behrmann, Christoph Piefke, and Frank Lechermann — 1. Institut für Theoretische Physik, Universität Hamburg
The combination of the local-density approximation to density functional theory with explicit many-body approaches has proven to be a powerful tool to investigate the problem of strong electronic correlations on a realistic level. The complex interplay of the effective dimensionality and the symmetry of the underlying crystal structure with the competition between the localized and the itinerant character of electrons is indeed giving rise to highly interesting physical phenomena in many modern materials, especially within the family of transition-metal oxides.
Here we want to discuss the intriguing interplay between rotational-invariant local Coulomb interactions and spin-orbit coupling for the case of the bilayer Ruthenate Sr3Ru2O7. New results based on a generic realistic modeling of the correlated electronic structure will be presented. In this respect, also the intriguing metamagnetic behavior of Sr3Ru2O7 will be addressed.