Figure 6
From: Pre-Yield Non-Affine Fluctuations and A Hidden Critical Point in Strained Crystals
a Plot of the defect concentration ρd (particles with 7 Delaunay neighbours) vs. ε in the 2D-LJ solid at ρ = 0.99 showing sharp growth of ρd for ε > ε*. Inset shows a particle neighbourhood at two different values of ε = .039 (open circles) and .068 (filled gray circles), showing the nucleation of a defect pair (black filled circles). Dashed and the bold lines shows change in topology of the local Delaunay neighbourhood with strain. b Plot of ρd vs. ϕ for all ρ and ε showing data collapse onto a single curve with ρd increasing sharply at ϕ*. Inset shows the same data in semi-log axes to emphasise the small ϕ region. Symbols: same as in Fig. 2a. c Particles coloured according to the value of the local non affine parameter χ for an isolated dislocation-anti-dislocation pair in a triangular crystal. d The same configuration as in c showing non-affine particles with χ > χcut (red filled circles). Majority of non-affine particles are associated with the dislocation dipole (black arrows).
