Fig. 3: The work of cleavage and the surface energy after ten relaxation steps of the cleaved surfaces.
From: Computational synthesis of substrates by crystal cleavage

Red indicates a higher density of points. The solid, dashed, and dotted black lines represent the work of cleavage of the (0001) CdS, ZnO, and AlN substrates, respectively. The grey region indicates materials have a work of cleavage greater than common substrates.