Journal
ACS NANO
Volume 4, Issue 7, Pages 4126-4130Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn1007868
Keywords
graphene; bilayer; hydrogenation; electric bias; density functional calculations
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Funding
- National Science Foundation [DMR-0934142]
- Army Research Office [W911NF-06-1-0442]
- Air Force Office of Scientific Research [FA9550-10-1-0254]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0934142] Funding Source: National Science Foundation
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We have studied the electronic structural characteristics of hydrogenated bilayer graphene under a perpendicular electric bias using first-principles density functional calculations. The bias voltage applied between the two hydrogenated graphene layers allows continuous tuning of the band gap and leads to transition from semiconducting to metallic state. Desorption of hydrogen from one layer in the chair conformation yields a ferromagnetic semiconductor with a tunable band gap. The implications of tailoring the band structure of biased system for future graphene-based device applications are discussed.
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