Figure 7: DFT calculations of franckeite’s electronic band structure.
From: Exfoliation of natural van der Waals heterostructures to a single unit cell thickness
(a–c) Electronic band structure of the T layer, H layer and T–H heterostructure (franckeite monolayer), respectively, determined using the local density approximation (LDA) of DFT. The vertical grey dotted lines follow the high symmetry points in the Brillouin zone. (d) LDA density of states (DOS) for the T–H heterostructure (monolayer), T–H–T heterostructure, T–H–T–H heterostructure (bilayer) and bulk franckeite. The blue dashed lines in all panels correspond to the Fermi level.
