2016/06/30 by Jad C. Halimeh, Matthias Punk · 1 citation
Physics and Astronomy · #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.94.104413
published as Phys. Rev. B 94, 104413 (2016) · 8 pages, 6 figures, journal paper
arxiv created 2016/09/13 · arxiv updated 2016/09/15
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 \bmk → -\bmk symmetry as well as the six-fold rotation symmetry around the Γ-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.