Raman spectra of misoriented bilayer graphene

Abstract

We compare the main feature of the measured Raman-scattering spectra from single layer graphene with a bilayer in which the two layers are arbitrarily misoriented. The profiles of the two-dimensional (2D) bands are very similar in having only one component, contrary to the four found for commensurate Bernal bilayers. These results agree with recent theoretical calculations and point to the similarity of the electronic structures of single layer graphene and misoriented bilayer graphene. We also show that the dependence of the 2D frequency on the laser excitation energy is different in these two latter systems.