Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7853161 | Carbon | 2014 | 8 Pages |
Abstract
Based on detailed first-principles investigations of the hexagonal antidot patterned graphene nanomeshes, we have studied the mechanisms of the conducting property modification of graphene. The band-folding analysis shows that the (3n,3m) (n and m are integers) superlattice would have fourfold degeneracy at Ð point. An effective method by removing this fourfold degeneracy, such as regularly arranging antidots to make the (3n,3m) nanomesh, is proposed to open a sizable bandgap no matter whether the sublattice equivalence keeps or not. In the nanomeshes patterned with the magnetic antidots, the antiferromagnetic coupling adds a quantum parameter to break the sublattice equivalence, resulting in the bandgap opening at the twofold degenerate K (Kâ²) point. Our studies also show that the gap width could be tuned by controlling the antidot density. These results could facilitate the fascinating applications of graphene in the next-generation nanoelectronics.
Related Topics
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Energy (General)
Authors
S.L. Xiu, M.M. Zheng, P. Zhao, Y. Zhang, H.Y. Liu, S.J. Li, G. Chen, Y. Kawazoe,