Regensburg 2016 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 50: Correlated Electrons: Frustrated Magnets - Theory
TT 50.3: Talk
Wednesday, March 9, 2016, 15:30–15:45, H18
Detailed phase diagram of Kitaev-Heisenberg model — •Dorota Gotfryd1,2, Juraj Rusnacko3, Jiri Chaloupka3, and Andrzej M. Oles2,4 — 1Institute of Theoretical Physics, University of Warsaw, Poland — 2Marian Smoluchowski Institute of Physics, Jagellonian University, Poland — 3Central European Institute of Technology, Masaryk University, Czech Republic — 4Max-Planck-Institut FKF, Germany
We present detailed phase diagram for the Kitaev-Heisenberg (KH) model [1] obtained by two approaches: ED and ED with cluster mean field introduced in [2]. While the evolution of ordered moments resulting from second method allows for more direct order/disorder phase transition analysis – we deliberately break SU(2) symmetry, spin correlation functions, spin-structure factor and dynamical spin susceptibility obtained from ED provide more details about the nature of two distinct spin liquid regions.
This work is supported by the NCN Project No. 2012/04/A/ST3/00331.
J. Chaloupka and G. Khaliullin, PRB 92, 043032 (2015)
A. F. Albuquerque et al., PRB 84, 024406 (2011).