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TT: Fachverband Tiefe Temperaturen

TT 59: Low-Dimensional Systems: Poster Session

TT 59.7: Poster

Wednesday, March 9, 2016, 15:00–18:30, Poster D

Functional renormalization group studies of spin-orbit entangled j=1/2 Mott insulators — •Finn Lasse Buessen and Simon Trebst — Institute for Theoretical Physics, University of Cologne, Germany

We apply a recently developed functional renormalization group (FRG) approach to study the collective phenomena of spin-orbit entangled j=1/2 moments in Mott insulators. The microscopic exchange of these moments can be captured by a Heisenberg-Kitaev model for various lattice geometries. We discuss technical aspects of the application of the pseudo-fermion FRG approach developed by Reuther and Wölfle and its efficient numerical implementation. Model systems to be discussed include the Heisenberg-Kitaev model on honeycomb and triangular lattice geometries, for which we discuss the formation of unconventional magnetism in the form of spin liquids or non-trivial spin textures.