Fig. 2

Faceting of the initial profile as defined in the “Initial Morphology and Simulation Setup” section according to surface diffusion and \(\gamma (\hat {\mathbf {n}})\) reproducing the surface energy of Si. Two different initial morphologies are considered: a R = 0.25 and b R = 0.5. On the faceted morphologies, symbols are adopted to identify the families of facets. The color scale shows the values of \(\gamma (\hat {\mathbf {n}})\) at the surface