Transformation from AA to AB-stacked bilayer graphene on α-SiO <inf>2</inf> under an electric field

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Journal Article
Chinese Physics Letters, 2011, 28 (8)
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The energetic and electronic structure of bilayered graphene (BLG) with AA stacking arrangement on a SiO2 substrate is investigated in the presence of an electric field F of different intensities by ab initio density functional calculations. The AA-stacked bilayer graphene is stable on the SiO2 substrate in the absence of an electric field. However, as F increases, the AA-stacked bilayer graphenes are gradually shifted with each other and finally transfers into AB-stacked bilayer graphenes. The bandgap is accordingly changed. © 2011 Chinese Physical Society and IOP Publishing Ltd.
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