Figure 4: Comparison of the spinon continuum between the kagome and the honeycomb lattices.

(a) Raman spectra of ZnCu3(OH)6Cl2 in (aa) polarization as a function of temperature. The data are taken from ref. 43. The shadings are the spinon continuum. The asterisks denote optical phonons with Fano line shape. (b,c) Raman spectra of β- and γ-Li2IrO3 at various temperatures.