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TT: Fachverband Tiefe Temperaturen

TT 79: Correlated Electrons - Poster Session

TT 79.21: Poster

Wednesday, April 2, 2014, 15:00–19:00, P2

The correlated semiconductor CrSb₂ — •Anna Galler, Jan Tomczak, and Karsten Held — Institut für Festkörperphysik, Technische Universität Wien

Intermetallic-based correlated semiconductors display an intriguing temperature dependence in their physical properties: while at high temperatures a Curie-Weiss-like susceptibility develops, a regime of notably large thermopower is found at low temperatures. Between the two regimes optical spectra exhibit large transfers of spectral weight.

Here, we present a theoretical many-body study for a member of this class of materials: CrSb₂. We compute interaction matrix elements from first principles using the constrained random-phase-approximation (cRPA) and study many-body spectra and response functions within LDA+DMFT (local density approximation combined with dynamical mean field theory).