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Halimeh, Jad C. and Punk, Matthias (2016): Spin structure factors of chiral quantum spin liquids on the kagome lattice. In: Physical Review B, Vol. 94, No. 10, 104413

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We calculate dynamical spin structure factors for gapped chiral spin liquid states in the spin-1/2 Heisenberg antiferromagnet on the kagome lattice using Schwinger-boson mean-field theory. In contrast to static (equal-time) structure factors, the dynamical structure factor shows clear signatures of time-reversal symmetry breaking for chiral spin liquid states. In particular, momentum inversion k -> -k symmetry as well as the sixfold rotation symmetry around the Gamma point are lost. We highlight other interesting features, such as a relatively flat onset of the two-spinon continuum for the cuboc1 state. Our work is based on the projective symmetry group classification of time-reversal symmetry breaking Schwinger-boson mean-field states by Messio, Lhuillier, and Misguich.

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