Electron-state engineering of bilayer graphene by ionic molecules | Zendy

Nguyen Thanh Cuong | Zendy; Minoru Otani | Zendy; Susumu Okada | Zendy

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Electron-state engineering of bilayer graphene by ionic molecules

Author(s) -

Nguyen Thanh Cuong,

Minoru Otani,

Susumu Okada

Publication year - 2012

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4769098

Subject(s) - bilayer graphene , ionic bonding , graphene , bilayer , ion , chemical physics , molecule , band gap , dipole , materials science , semiconductor , chemistry , nanotechnology , optoelectronics , membrane , organic chemistry , biochemistry

Based on the first-principles total-energy calculations, we demonstrate the possibility of controlling the band-gap and carrier type of bilayer graphene using ionic molecules. Our calculations suggest that bilayer graphene sandwiched by a pair of cation-anion molecules is a semiconductor with a moderate energy gap of 0.26 eV that is attributable to the strong local dipole field induced by the cation-anion pair. Furthermore, we can control the semiconducting carrier type—intrinsic, p-type, or n-type—of bilayer graphene sandwiched by ionic molecules by changing the cation-anion pair

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