Novel electronic structures of superlattice composed of graphene and silicene

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	Novel electronic structures of superlattice composed of graphene and silicene
	Yu, S. ; Li, X.D. ; Wu, S.Q. ; Wen, Y.H. ; Zhou, S. ; Zhu, Z.Z. ; Zhu ZZ(朱梓忠)
刊名	http://dx.doi.org/10.1016/j.materresbull.2013.11.033
	2014
关键词	Charge transfer Crystal structure Electronic properties Electronic structure Materials properties Nanostructures Superlattices Van der Waals forces
英文摘要	Superlattice is a major force in providing man-made materials with unique properties. Here we report a study of the structural and electronic properties of a superlattice made with alternate stacking of graphene and hexagonal silicene. Three possible stacking models, i.e., the top-, bridge- and hollow-stacking, are considered. The top-stacking is found to be the most stable pattern. Although both the free-standing graphene and silicene are semi-metals, our results suggest that the graphene and silicene layers in the superlattice both exhibit metallic electronic properties due to a small amount of charge transfer from the graphene to the silicene layers. More importantly, the Dirac point of graphene is folded to the Γ-point of the superlattice, instead of the K-point in the isolated graphene. Such a change in the Dirac point of graphene could lead to significant change in the transportation property of the graphene layer. Moreover, the band structure and the charge transfer indicate that the interaction between the stacking sheets in the graphene/silicene superlattice is more than just the van der Waals interaction. ? 2013 Elsevier Ltd. All rights reserved.
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/92229]
专题	物理技术－已发表论文
推荐引用方式 GB/T 7714	Yu, S.,Li, X.D.,Wu, S.Q.,et al. Novel electronic structures of superlattice composed of graphene and silicene[J]. http://dx.doi.org/10.1016/j.materresbull.2013.11.033,2014.
APA	Yu, S..,Li, X.D..,Wu, S.Q..,Wen, Y.H..,Zhou, S..,...&朱梓忠.(2014).Novel electronic structures of superlattice composed of graphene and silicene.http://dx.doi.org/10.1016/j.materresbull.2013.11.033.
MLA	Yu, S.,et al."Novel electronic structures of superlattice composed of graphene and silicene".http://dx.doi.org/10.1016/j.materresbull.2013.11.033 (2014).