Electron-phonon interactions in bilayer graphene

Using calculations from first principles, we demonstrate that intrinsic carrier-phonon scattering in bilayer graphene is dominated by low-energy acoustic (and acousticlike) phonon modes in a framework that bears more resemblance to bulk graphite than to monolayer graphene. The total scattering rate at low to moderate electron energies can be described by a simple two-phonon model in the deformation potential approximation with effective constants D-ac approximate to 15 eV and D-op approximate to 2.8 x 10(8) eV/cm for acoustic and optical phonons, respectively. With much enhanced acoustic phonon scattering, the mobility of intrinsic bilayer graphene is estimated to be significantly smaller than that of the monolayer.