Figure 6
Variations of [relation (13)] versus δ according to the point symmetry of the crystalline system of the monolayer (regardless of whether the bilayer is periodic or not): (a) 1, m, (b) 2, 2m, (c) 4, 4m, (d) 3, 3m1, 31m and (e) 6, 6m. In all cases but the oblique and trigonal, the largest value of is obtained for and the smallest for . |