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Title: Novel electronic structures of superlattice composed of graphene and silicene

Abstract

Highlights: • Graphene/silicene superlattices exhibit metallic electronic properties. • Dirac point of graphene is folded to the Γ-point in the superlattice system. • Significant changes in the transport properties of the graphene layers are expected. • Small amount of charge transfer from the graphene to the silicene layers is found. - Abstract: 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 andmore » 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.« less

Authors:
;  [1];  [1];  [2]
  1. Department of Physics and Institute of Theoretical Physics and Astrophysics, Xiamen University, Xiamen 361005 (China)
  2. State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190 (China)
Publication Date:
OSTI Identifier:
22345216
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 50; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; CRYSTAL STRUCTURE; ELECTRONIC STRUCTURE; GRAPHENE; INTERACTIONS; LAYERS; NANOSTRUCTURES; SUPERLATTICES; VAN DER WAALS FORCES

Citation Formats

Yu, S., Li, X. D., Wu, S.Q., E-mail: wsq@xmu.edu.cn, Wen, Y. H., Zhou, S., Zhu, Z.Z., E-mail: zzhu@xmu.edu.cn, State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Xiamen 361005. Novel electronic structures of superlattice composed of graphene and silicene. United States: N. p., 2014. Web. doi:10.1016/J.MATERRESBULL.2013.11.033.
Yu, S., Li, X. D., Wu, S.Q., E-mail: wsq@xmu.edu.cn, Wen, Y. H., Zhou, S., Zhu, Z.Z., E-mail: zzhu@xmu.edu.cn, State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, & Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Xiamen 361005. Novel electronic structures of superlattice composed of graphene and silicene. United States. https://doi.org/10.1016/J.MATERRESBULL.2013.11.033
Yu, S., Li, X. D., Wu, S.Q., E-mail: wsq@xmu.edu.cn, Wen, Y. H., Zhou, S., Zhu, Z.Z., E-mail: zzhu@xmu.edu.cn, State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Xiamen 361005. 2014. "Novel electronic structures of superlattice composed of graphene and silicene". United States. https://doi.org/10.1016/J.MATERRESBULL.2013.11.033.
@article{osti_22345216,
title = {Novel electronic structures of superlattice composed of graphene and silicene},
author = {Yu, S. and Li, X. D. and Wu, S.Q., E-mail: wsq@xmu.edu.cn and Wen, Y. H. and Zhou, S. and Zhu, Z.Z., E-mail: zzhu@xmu.edu.cn and State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190 and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Xiamen 361005},
abstractNote = {Highlights: • Graphene/silicene superlattices exhibit metallic electronic properties. • Dirac point of graphene is folded to the Γ-point in the superlattice system. • Significant changes in the transport properties of the graphene layers are expected. • Small amount of charge transfer from the graphene to the silicene layers is found. - Abstract: 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.},
doi = {10.1016/J.MATERRESBULL.2013.11.033},
url = {https://www.osti.gov/biblio/22345216}, journal = {Materials Research Bulletin},
issn = {0025-5408},
number = ,
volume = 50,
place = {United States},
year = {Sat Feb 01 00:00:00 EST 2014},
month = {Sat Feb 01 00:00:00 EST 2014}
}