Figure 3: Electronic band structures of twisted graphene bilayer.
From: Strain and curvature induced evolution of electronic band structures in twisted graphene bilayer
Density plots of the energy dispersion of twisted graphene bilayer for (a) {ε=0, θ=5.1o}, (b) {ε=0.1, θ=5.1o}, (c) {ε=0.15, θ=5.1o} and (d) {ε=0.15, θ=5.1o} with a curvature radius of ~1.41 nm at the top of the wrinkle. The white points are the four Dirac points: K, Kθ, K′ and Kθ′. In panel (e) we have a cut of the electronic band structures along K and Kθ, showing the decreasing of ΔEvhs as strain increases (in a small and moderate strain). In panel (f), we have a cut of the electronic band structures along K and Kθ′, showing the merging of the Dirac cones as the strain increases and the ultimate appearance of the gap induced by the joint effect of the strain and the curvature.
