Dresden 2009 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 33: Postersession Correlated Electrons: Metal Insulator Transition, Spin Systems and Itinerant Magnets

TT 33.1: Poster

Mittwoch, 25. März 2009, 14:00–18:00, P1A

Optical conductivity and correlated bands of LaVO₃ and YVO₃ — •David Heilmann and Eva Pavarini — Institut für Festkörperforschung, Forschungzentrum Jülich, 52425 Jülich, Germany

We calculate the optical conductivities and momentum-resolved spectral functions for the 3d² vanadates LaVO₃ and YVO₂.

As a method we adopt the LDA+DMFT technique, using Quantum Monte Carlo as an impurity solver. We obtain the self-energy matrix on the real axis by means of the Maximum-Entropy technique and a self-consistent procedure. We use the self-energy matrix to calculate the correlated band structure and the optical conductivity of LaVO₃ and YVO₂ both for the high-temperature orthorhombic and the low-temperature monoclinic structure. The effects of orbital fluctuations are discussed.