BaCo2(AsO4)2: Strong Kitaev, After All
Abstract
The inelastic neutron scattering results and their analysis unequivocally point to a dominant Kitaev interaction in the honeycomb-lattice cobaltate BaCo2(AsO4)2. Our anisotropic-exchange model closely describes all available neutron scattering data in the material's field-polarized phase. The density-matrix renormalization group results for our model are in close accord with the unusual double-zigzag magnetic order and the low in-plane saturation field of BaCo2(AsO4)2.
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