Figure 3.

(a) Local BO order field ${\mathsf{\Psi }}_n\left(\mathit{r}\right)$ in a 2D system with the short-range BO order; (b) Diffraction pattern in the case of the short-range bond-orientational (BO) order; (c) schematic structure of the 2D hexatic phase exhibiting a quasi-long-range sixfold BO order; (d) diffraction pattern from the 2D hexatic phase. Color in (b,d) represents the intensity of the scattered X-rays.