Magnetic order and spin excitations in the Kitaev–Heisenberg model on a honeycomb lattice

We consider the quasi-two-dimensional pseudo-spin-1/2 Kitaev–Heisenberg model proposed for A 2 IrO 3 (A = Li, Na) compounds. The spin-wave excitation spectrum, the sublattice magnetization, and the transition temperatures are calculated in the random phase approximation for four different ordered ph...

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