Regensburg 2016 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 78: Correlated Electrons: Poster Session
TT 78.29: Poster
Donnerstag, 10. März 2016, 15:00–18:30, Poster D
Effect of explicit oxygen screening in the three-orbital cuprate model — •Xiaodong Cao1, Cornelia Hille2, Priyanka Seth3, Thomas Ayral3,4, Olivier Parcollet3, Sabine Andergassen2, and Philipp Hansmann1 — 1Max-Planck-Institute for Solid State Research Heisenbergstr. 1, 70569 Stuttgart , Germany — 2Institut für Theoretische Physik, Universität Tübingen, Auf der Morgenstelle 14, 72076 Tübingen, Germany — 3Institut de Physique Théorique(IPhT), CEA, CNRS, 91191Gif-sur-Yvette, Franc — 4Centre de Physique Théorique, Ecole Polytechnique, CNRS, 91128 Palaiseau Cedex, France
In the theoretical treatment of transition metal oxides we are always confronted with the question how important oxygen degrees of freedom are for ground state properties and low lying excitations. Different strategies have been employed in the past which can be separated into approaches that treat oxygen either implicitly as part of the effective transition metal 3d Wannier function or explicitly as non-interacting bath where correlated 3d states are "embedded". In the presented DMFT study we promote oxygen degrees of freedom to be active players for the correlated subspace by means of an RPA screening of the effective d-interaction which is now dynamic and included in a self-consistent way.