FIG. 5.

The angle δ_i = χ_i − ϕ_i is heavily oscillating between sites with nearby radius. In most cases, δ_i only depends on the value of the radius |z_i| = r_i. Here we plot the averaged angle δ_i vs site radius r_i for the first five rings (comprising 847 sites). The red “error bars” indicate those cases where the mapping δ_i ↔ r_i is not unique. Still, for any given site i we can unambiguously assign the value of δ_i through Eqs. (B7)–(B9).