Dresden 2014 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 79: Correlated Electrons - Poster Session

TT 79.19: Poster

Mittwoch, 2. April 2014, 15:00–19:00, P2

Bulk and interface half-metallicity in heterostructures based on Co₂MnAl — •Andreas Held¹, Kathrin Garb¹, Igor Di Marco², Stanislav Chadov³, and Liviu Chioncel^1,4 — ¹Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, D-86135 Augsburg, Germany — ²Department of Physics and Astronomy, Uppsala University, Box 516, SE-75120 Uppsala, Sweden — ³Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden, Germany — ⁴Augsburg Center for Innovative Technologies, University of Augsburg, D-86135 Augsburg, Germany

We study electronic correlation effects in bulk Co₂MnAl and (Co₂MnAl/CoMnVAl) heterostructures within a combined density functional and Dynamical Mean Field Theory. We analyze the changes in the topology of the bulk Fermi surface as well as in the electronic properties by approaching the interface via a function of temperature and the strength of the local Coulomb interaction U.