Fig. S2.

Base particles (blue) with an isosurface (orange) plotted of the potential field felt by a dopant particle. (A) Static base crystal with isosurface at $\mathrm{\Delta }U=3.5k_{B}T$. (B) Potential field of a snapshot at $t=2\cdot {10}^3{\sigma }_b$ with an isosurface at $\mathrm{\Delta }U=42k_{B}T$.