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TT: Fachverband Tiefe Temperaturen

TT 31: Correlated Electrons: Other Materials

TT 31.3: Talk

Tuesday, March 21, 2017, 14:30–14:45, HSZ 103

Importance of Mott physics in manganese pnictides — •Manuel Zingl, Elias Assmann, and Markus Aichhorn — Institute of Theoretical Physics and Computational Physics, Graz University of Technology, Austria

Manganese pnictides, e.g. BaMn₂As₂ and LaMnAsO, attract attention due to their exceptional physical properties. Thus, revealing the underlying electronic mechanisms is highly desired. These compounds have a nominally half-filled d shell, and as a consequence, electronic correlations are strong, placing them at the verge of a metal-insulator transition. In addition to electronic correlations, the effective dimensionality is another fundamental factor in understanding their physical properties. We demonstrate that experimentally observed Néel temperatures, band gaps, conductivities and also Seebeck coefficients of the compounds under consideration can be explained by our DFT+DMFT calculations.