Figure 4: Berry curvature, Ωn,z(k), of bands across the bandgap.
From: Valley-selective circular dichroism of monolayer molybdenum disulphide
The blue curve corresponds to the top of valence bands. The red curve corresponds to the bottom of conduction bands. The Berry curvatures of the states along the K−−Γ−K+ path of the Brillouin zone are plotted. The value of Berry curvature is large for the conduction band at the zone centre, where bands are degenerate.
