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Di Ciolo, A., Carrasquilla, J., Becca, F., Rigol, M., & Galitski, V. M. (2014). Spiral antiferromagnets beyond the spin-wave approximation: Frustrated XY and Heisenberg models on the honeycomb lattice. Physical Review B, 89. http://doi.org/10.1103/PhysRevB.89.094413

Carrasquilla, J., Di Ciolo, A., Becca, F., Galitski, V. M., & Rigol, M. (2013). Nature of the phases in the frustrated XY model on the honeycomb lattice. Physical Review B, 88. http://doi.org/10.1103/PhysRevB.88.241109