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In recent years, a lot of effort has been devoted to the quest for experimental realizations of Kitaev interactions in spin systems. Recently, many materials have been proposed which seem to realize extended Kitaev models, where the Kitaev interactions are supplemented by Heisenberg and other bond dependent terms. The symmetry and electronic structure of these materials renders the determination of a minimal model a non trivial pursuit. In this talk I will concentrate on one of these particular materials, A-Li2IrO3, for which various minimal models have been proposed. Employing large scale Monte Carlo simulations I will show how the number of prospective models can be reduced. I will show that many of those models do not reproduce the most recent experimental results. Furthermore, I will propose and predict the results of an experiment which could help determine which one of the proposed models, if any, is the minimal model of A-Li2IrO3.

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Laura Baez, FU Berlin
Seminarraum Alte Theorie
Contact: Simon Trebst