Fig. 1: In-plane and out-of-plane deformation modes of 2D crystals.
From: Machine learning enables the discovery of 2D Invar and anti-Invar monolayers
a One-dimensional atomic chain model for the in-plane and out-of-plane deformation. b The atomic configurations of the ripple of graphene membrane. c The linear thermal expansion coefficient (α) of graphene and MoS2(2H) at temperatures ranging from 0 K to 1000 K. The inset shows the crystal structures of graphene and MoS2.
