Geometrically induced π-band splitting in graphene superlattices Project jointly supported by the Natural Science Foundation of Shandong Province (Grant NO. TSHW20101004) and the National Natural Science Foundation of China (Grant Nos. 11374128 and 11674129). |
(color online) The schematic structure (a), Brillouin zone (b), and band structure (c) for the (1,1) PGS; those for the (1,2) PGS are in panels (d), (e), and (f); and the ones for the (1,3) PGS are in panels (g), (h), and (i). |