Fig. 5: Structure analysis.
a Phase diagram illustrating the four possible structural states. The thick solid lines are identical to those shown in Fig. 4. Phases are distinguished by comparing the distribution of the local packing fraction ϕ and the one of the orientational order parameter ψ6 (see Methods for details). b, e Snapshots for the different structural phases. Particles are colored according to their speed, i.e. red and blue for high and low speed, respectively. The stars above each snapshot indicate the corresponding parameters f0, Φ in the phase diagram a. f–i Probability distributions of the local packing fraction Prob(ϕ) (violet) and the hexagonal local order parameter Prob(ψ6) (green). The vertical dashed lines mark the average packing fraction value Φ. The snapshots (b)–(e) correspond to the distribution (f)–(i), respectively.
