Figure 3.
A theoretical model for estimating the surface conductivity of tMLG. (a) A schematic of the SSR model for calculating the surface conductivity of a multilayer structure. Schematic distribution of the electrical potential during a typical c-AFM experiment (left panel); the definition of Ri (middle panel); SSR model with a decaying factor e−α (right panel). (b) Schematics showing the idealized stacking structures for H domains and L domains in twisted 1 L/graphite, 2 L/graphite and 3 L/graphite structures; these stacking states are qualitatively confirmed by MD simulations. (c) Comparison between the theoretical prediction with idealized stacking configurations and the experimental results. (d) Calculated 2D conductivity maps of the twisted 1 L/graphite, 2 L/graphite, 3 L/graphite and 10 L/graphite structures with the same twist angles of 0.3° based on the local registry index. Scale bars, 50 nm.