Figure 4: Energy gap and ΔEvhs as a function of strain.
From: Strain and curvature induced evolution of electronic band structures in twisted graphene bilayer

In panel (a), the red dash line corresponds to a Gaussian fitting to the section line of the graphene wrinkle, as shown in Fig. 1c. Panel (b) shows that the energy gap increases as the strain increases for a fixed curvature radius of ~1.41 nm at the top of the wrinkle. Panel (c) shows the value of ΔEvhs as a function of the strain in flat twisted graphene bilayer.