Spin-liquid phase in a spin-1/2 quantum magnet on the kagome lattice.

@article{Isakov2006SpinliquidPI,
  title={Spin-liquid phase in a spin-1/2 quantum magnet on the kagome lattice.},
  author={Sergei V. Isakov and Yong Baek Kim and Arun Paramekanti},
  journal={Physical review letters},
  year={2006},
  volume={97 20},
  pages={
          207204
        }
}
We study a model of hard-core bosons with short-range repulsive interactions at half filling on the kagome lattice. Using quantum Monte Carlo numerics, we find that this model shows a continuous superfluid-insulator quantum phase transition, with exponents z=1 and nu approximately 0.67(5). The insulator, I*, exhibits short-ranged density and bond correlations, topological order, and exponentially decaying spatial vison correlations, all of which point to a Z2 fractionalized phase. We estimate… 

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