An effective method of tuning conducting properties: First-principles studies on electronic structures of graphene nanomeshes

摘要: Based on detailed first-principles investigations of the hexagonal antidot patterned graphene nanomeshes, we have studied mechanisms conducting property modification graphene. The band-folding analysis shows that (3n,3m) (n and m are integers) superlattice would fourfold degeneracy at Г point. An effective method by removing this degeneracy, such as regularly arranging antidots to make nanomesh, is proposed open a sizable bandgap no matter whether sublattice equivalence keeps or not. In nanomeshes with magnetic antidots, antiferromagnetic coupling adds quantum parameter break equivalence, resulting in opening twofold degenerate K (K′) Our studies also show gap width could be tuned controlling density. These results facilitate fascinating applications next-generation nanoelectronics.