The unique electronic properties of graphene make it an attractive candidate for future nano-electronics applications. However, the gapless character of graphene band structure presents a major obstacle for graphene electronics. This talk will describe a proposal [1] to use controlled chemical adsorption of adatoms or molecules similar to that employed in a recent work on hydrogenated graphene[1], as a tool to open a band gap in this material. The gap is induced by Bragg scattering on a modulation resulting from adatom ordering among the A and B sublattices, which can occur even at small adatom concentration, n << 1.
[1] D.A. Abanin, A.V. Shytov, L.S. Levitov, Phys. Rev. Lett. 105,
086802 (2010).
A.V. Shytov, D.A. Abanin, L.S. Levitov, Phys. Rev. Lett. 103, 016806 (2009).