Biased bilayer graphene: semiconductor with a gap tunable by the electric field effect.

By E. Castro, K. Novoselov, S. Morozov, N. M. R. Peres, J. L. D. dos Santos, J. Nilsson, Francisco Guinea, A.K. Geim, A. C. Castro Neto. Physical Review Letters, 2006

1,572 citations recorded by the source corpus.

We demonstrate that the electronic gap of a graphene bilayer can be controlled externally by applying a gate bias. From the magnetotransport data (Shubnikov-de Haas measurements of the cyclotron mass), and using a tight-binding model, we extract the value of the gap as a function of the electronic density. We show that the gap can be changed from zero to midinfrared energies by using fields of less, approximately < 1 V/nm, below the electric breakdown of SiO2. The opening of a gap is clearly seen in the quantum Hall regime.

Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/c13103cd0265bf4777bb2a8a79bfbc91ea47315c

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In Atomic and Molecular Physics, and Optics

1. N. M. R. Peres
2. K. Novoselov
3. E. Hwang
4. E. Rossi
5. S. Adam
6. Francisco Guinea
7. A.K. Geim
8. A. C. Castro Neto

In Materials Chemistry

1. N. M. R. Peres
2. K. Novoselov
3. E. Hwang
4. E. Rossi
5. Francisco Guinea
6. S. Adam
7. A. C. Castro Neto
8. A.K. Geim

Citations in the corpus

• The shear mode of multilayer graphene. (2011, background): “[3] Castro, E.”
• Colloquium: Graphene spectroscopy (2014, background): “These differences give rise to many new phenomena, ranging from a tunable band gap (McCann, 2006; McCann and Fal’ko, 2006; Castro et al., 2007; Oostinga et al., 2007; Zhang, Tang et al., 2009) to strongly correlated ground states (Feldman, Martin, and Yacoby, 2009; Bao et al.”
• Graphene Transistors: Status, Prospects, and Problems (2013, background): “Moreover, bandstructure calculations for GNRs and bilayer graphene reveal a high degree of symmetry of the conduction and valence bands pointing to similar effective electron and hole masses [51], [59].”
• Nobel Lecture: Graphene: Materials in the Flatland (2011, background): “One could also use bilayer graphene, as a gap can be opened by applying a potential difference between the two layers (Ohta et al., 2006; Castro et al., 2007; Oostinga et al., 2007; Kuzmenko et al., 2009a, 2009b; Zhang et al., 2009; Castro et al., 2010).”
• Uniaxial strain on graphene: Raman spectroscopy study and band-gap opening. (2008, methodology): “Different attempts have been made by researchers, such as patterning graphene into nanoribbon,(3) forming graphene quantum dots,(2) making use of multilayer graphene sheets and applying an external electrical field.(4) According to the carbon nanotubes (CNTs) study, the strain will dramatically chan”