$\mathbb Z_2$ slave-spin theory of a strongly correlated Chern insulator
  We calculate the phase diagram of the topological honeycomb model in the presence of strong interactions. We concentrate on half filling and employ a ${\mathbb Z}_{2}$ slave-spin method to find a band insulator with staggered density, a spin-density-wave and a Mott insulating phase. Both the band insulator and the spin-density wave come in various topological varieties. Finally, we calculate the response function relevant for lattice modulation spectroscopy with cold atomic gases in optical lattices. 
Diana Prychynenko and Sebastian D. Huber
cond-mat.str-el cond-mat.quant-gas