Figure 1: (IMAGE)

Japan Advanced Institute of Science and Technology

Figure 1:

Caption

The surface represents the low energy bands of the bilayer graphene around the K valley and the colour of the surface indicates the magnitude of Berry curvature, which acts as a new information carrier. When the top and bottom hBN are out-of-phase with each other (a) the Berry curvature magnitude is very small and is confined to the K-valley. However, when the top and bottom hBN are in phase with each other (b) the asymmetry induced between the layers of bilayer graphene results in large Berry curvature which is widely spread around the K-valley of the reciprocal space.

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