Fig. 5: Lattice vectors and bandgaps for the substrates.
From: Computational synthesis of substrates by crystal cleavage
Semiconducting or insulating substrates identified are shown for (a) hexagonal, (b) square, and (c) tetragonal surfaces. For the tetragonal substrates in (c), the a and b lattice vectors are both plotted and connected with a dashed line, and the kernel density of the b lattice vectors is plotted in grey. 93 of the 106 commercially available insulating substrates identified are shown in red filled markers. For metallic substrates, (d) shows boxplots for the hexagonal and square surface structures and the b/a ratio of the tetragonal ones. The 23 monoclinic surfaces are not represented in these figures. The symmetry is classified using an in-plane lattice vector length tolerance of 1% and angle tolerance of 0.5Ëš. Substrates containing f-valence elements are not shown.
