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TT: Tiefe Temperaturen

TT 16: Posters Correlated Electrons, Measuring Devices, Cryotechnique

TT 16.67: Poster

Samstag, 5. März 2005, 11:00–16:30, Poster TU C

Microscopic theory of half-metallic double perovskites — •Nils Blümer, Carsten Knecht, Krunoslav Požgajčić und P. G. J. van Dongen — Institut für Physik, Johannes Gutenberg - Universität, 55099 Mainz

Half-metallic double perovkites such as Sr₂FeReO₆ and Sr₂FeReO₆ are promising materials for spintronic applications. Due to the strong correlations associated with the Fe sites, conventional band structure calculations are not reliable for this class of systems. We review the present status of correlated-electron approaches for double perovskite materials and outline our strategy for microscopic calculations using an improved algorithm for quantum Monte Carlo simulations within the framework of dynamical mean-field theory (DMFT). Prospects for application of the recently developed self-energy functional theory in this context are also discussed. Funded by DFG: FOR 559/1.