Fig. 4: Correlation between chemical bond and elastic property.
From: Understanding the deformability of 2D van der Waals materials from the perspective of chemical bonds
a Elastic modulus for typical hexagonal vdW crystals, Exy and Ez are the in-plane and out-of-plane elastic modulus, respectively. b Exy versus total -ICOHP per unit area for the cross-layer plane. c Schematics of monolayer thickness for GaS. d Exy/Ez ratio versus monolayer thickness (tl). r and R2 are the Pearson correlation coefficient and the linearity coefficient, respectively.
