Tunable band gaps in bilayer graphene-BN heterostructures.
basic_science · Level V
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- Record sourced from PubMed, PMID 21275424.
- Also identified by DOI 10.1021/nl1039499.
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Abstract
We investigate band gap tuning of bilayer graphene between hexagonal boron nitride sheets, by external electric fields. Using density functional theory, we show that the gap is continuously tunable from 0 to 0.2 eV and is robust to stacking disorder. Moreover, boron nitride sheets do not alter the fundamental response from that of free-standing bilayer graphene, apart from additional screening. The calculations suggest that graphene-boron nitride heterostructures could provide a viable route to graphene-based electronic devices.