Fig. 8: Dynamic spin structure factor \({\tilde{{{{\bf\mathcal{S}}}}}}^{zz}(q,\omega )\) obtained by ED in the truncated Hilbert space.
From: Fractional and composite excitations of antiferromagnetic quantum spin trimer chains
a–h are the ED calculations for different g values. Here, the system with L = 24 spins (N = 8 unit cells) is considered. A Lorentzian broadening of width 0.05 was used of the δ functions in Eq. 26. The boundary between the linear and logarithmic color mapping is U0 = 6 (see definition in the caption of Fig. 2) as indicated on the color bar.
