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Title: Manipulation of Dirac cones in intercalated epitaxial graphene

Abstract

Graphene is an intriguing material in view of its unique Dirac quasi-particles, and the manipulation of its electronic structure is important in material design and applications. Here, we theoretically investigate the electronic band structure of epitaxial graphene on SiC with intercalation of rare earth metal ions (e.g., Yb and Dy) using first-principles calculations. We can use the intercalation to control the coupling of the constituent components (buffer layer, graphene, and substrate), resulting in strong modification of the graphene band structure. We also demonstrate that the metal-intercalated epitaxial graphene has tunable band structures by controlling the energies of Dirac cones as well as the linear and quadratic band dispersion depending on the intercalation layer and density. Thus, the metal intercalation is a viable method to manipulate the electronic band structure of the epitaxial graphene, which can enhance the functional utility and controllability of the material.

Authors:
 [1];  [1];  [1]; ORCiD logo [1];  [1];  [2];  [1];  [1]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States); Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States); Iowa State Univ., Ames, IA (United States). Dept. of Chemistry and Dept. of Materials Science and Engineering
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1371886
Report Number(s):
IS-J 9370
Journal ID: ISSN 0008-6223; PII: S0008622317306991
Grant/Contract Number:
AC02-07CH11358; AC02-05CH11231
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Carbon
Additional Journal Information:
Journal Volume: 123; Journal Issue: C; Journal ID: ISSN 0008-6223
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; epitaxial graphene; graphene intercalation; density functional theory; electronic structure; dirac cone

Citation Formats

Kim, Minsung, Tringides, Michael C., Hershberger, Matthew T., Chen, Shen, Hupalo, Myron, Thiel, Patricia A., Wang, Cai-Zhuang, and Ho, Kai-Ming. Manipulation of Dirac cones in intercalated epitaxial graphene. United States: N. p., 2017. Web. doi:10.1016/j.carbon.2017.07.020.
Kim, Minsung, Tringides, Michael C., Hershberger, Matthew T., Chen, Shen, Hupalo, Myron, Thiel, Patricia A., Wang, Cai-Zhuang, & Ho, Kai-Ming. Manipulation of Dirac cones in intercalated epitaxial graphene. United States. doi:10.1016/j.carbon.2017.07.020.
Kim, Minsung, Tringides, Michael C., Hershberger, Matthew T., Chen, Shen, Hupalo, Myron, Thiel, Patricia A., Wang, Cai-Zhuang, and Ho, Kai-Ming. Wed . "Manipulation of Dirac cones in intercalated epitaxial graphene". United States. doi:10.1016/j.carbon.2017.07.020.
@article{osti_1371886,
title = {Manipulation of Dirac cones in intercalated epitaxial graphene},
author = {Kim, Minsung and Tringides, Michael C. and Hershberger, Matthew T. and Chen, Shen and Hupalo, Myron and Thiel, Patricia A. and Wang, Cai-Zhuang and Ho, Kai-Ming},
abstractNote = {Graphene is an intriguing material in view of its unique Dirac quasi-particles, and the manipulation of its electronic structure is important in material design and applications. Here, we theoretically investigate the electronic band structure of epitaxial graphene on SiC with intercalation of rare earth metal ions (e.g., Yb and Dy) using first-principles calculations. We can use the intercalation to control the coupling of the constituent components (buffer layer, graphene, and substrate), resulting in strong modification of the graphene band structure. We also demonstrate that the metal-intercalated epitaxial graphene has tunable band structures by controlling the energies of Dirac cones as well as the linear and quadratic band dispersion depending on the intercalation layer and density. Thus, the metal intercalation is a viable method to manipulate the electronic band structure of the epitaxial graphene, which can enhance the functional utility and controllability of the material.},
doi = {10.1016/j.carbon.2017.07.020},
journal = {Carbon},
number = C,
volume = 123,
place = {United States},
year = {Wed Jul 12 00:00:00 EDT 2017},
month = {Wed Jul 12 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on July 12, 2018
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Cited by: 1work
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