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Dirac Cone in two dimensional bilayer graphene by intercalation with V, Nb, and Ta transition metals

Title: Dirac Cone in two dimensional bilayer graphene by intercalation with V, Nb, and Ta transition metals.
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Name(s): Pakhira, Srimanta, author
Lucht, Kevin P., author
Mendoza-Cortes, Jose L., author
Type of Resource: text
Genre: Text
Working Paper
Date Issued: 2017-09-16
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Summary: Bilayer graphene (BLG) is semiconductor whose band gap and properties can be tuned by various methods such as doping or applying gate voltage. Here, we show how to tune electronic properties of BLG by intercalation of transition metal (TM) atoms between two monolayer graphene (MLG) using a novel dispersion-corrected first-principle density functional theory approach. We intercalated V, Nb, and Ta atoms between two MLG. We found that the symmetry, the spin, and the concentration of TM atoms in BLG-intercalated materials are the important parameters to control and to obtain a Dirac Cone in their band structures. Our study reveals that the BLG intercalated with one Vanadium (V) atom, BLG-1V, has a Dirac Cone at the K-point. In all the cases, the present DFT calculations show that the 2pz sub-shells of C atoms in graphene and the 3dyz sub-shells of the TM atoms provide the electron density near the Fermi level EF which controls the material properties. Thus, we show that out-of-plane atoms can influence in-plane electronic densities in BLG, and enumerate the conditions necessary to control the Dirac point. This study presents a new strategy for controlling the material properties of BLG so that they exhibit various behaviors, including: metal, semi-metal, and semiconductor by varying the concentration and spin arrangement of the TM atoms in BLG while offering insight into the physical properties of 2D BLG-intercalated materials.
Identifier: FSU_libsubv1_scholarship_submission_1519056039_9000b4fa (IID)
Publication Note: This is a Pre-Print publication, originally published in arXiv at https://arxiv.org/abs/1704.08800.
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_scholarship_submission_1519056039_9000b4fa
Host Institution: FSU
Is Part Of: arXiv.

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Pakhira, S., Lucht, K. P., & Mendoza-Cortes, J. L. (2017). Dirac Cone in two dimensional bilayer graphene by intercalation with V, Nb, and Ta transition metals. Arxiv. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_scholarship_submission_1519056039_9000b4fa