Robustness and Fragility of a Linear Dispersion Band of Bilayer Graphene under an Electric Field
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概要
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Based on first-principles total-energy calculations, we investigate the electronic structure of bilayer graphene under a vertical electric field for various stacking arrangements. We find that the electronic structure of bilayer graphene near the Dirac point is robust against an external electric field and, with the exception of the bilayer graphene in a Bernal stacking arrangement, maintains its original electronic structure under zero electric field. We also find that the nearly free electron state crosses the Fermi level under an electric field of about 0.7 V/Å for all considered stacking arrangements of bilayer graphene.
- 2012-11-15
著者
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Okada Susumu
Graduate School of Pure and Applied Sciences and Center for Computational Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
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Konabe Satoru
Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
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