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Berlin 2015 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 100: Correlated Electrons: Other Materials

TT 100.12: Talk

Thursday, March 19, 2015, 18:00–18:15, H 3005

Electronic and magnetic properties of manganese pnictides — •Manuel Zingl, Simon Erker, and Markus Aichhorn — Institute of Theoretical Physics and Computational Physics, Graz University of Technology, Petersgasse 16, 8010 Graz, Austria

We study the electronic and magnetic properties of the manganese based compounds BaMn2As2 and LaOMnAs by combining density functional theory and dynamical mean field theory (DFT + DMFT). These systems crystallize in the same structure as the iron based pnictide superconductors and were experimentally determined to small gap semiconductors with a Néel type antiferromagnetic ground state. With our study we will clarify the importance of electronic correlations on the formation of the insulating gap. Within DMFT we consider a dp-model corresponding to the experimental crystal structure and we investigate the influence of the selected energy window, the double counting correction and the interaction parameters U and J.

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