We investigate electronic band-structure images in reciprocal space of few layer graphene epitaxially grown on SiC(000-1). In addition to the observation of commensurate rotation angles of the graphene layers, the k-space images recorded near the Fermi edge highlight structures originating from diffraction of the Dirac cones due to the relative rotation of adjacent layers. The 21.9{\deg} and 27{\deg} rotation angles between two sheets of graphene are responsible for a periodic pattern that can be described with a superlattice unit cells. The superlattice generates replicas of Dirac cones with smaller wave vectors, due to a Brillouin zone folding.
@article{arxiv.1806.06559,
title = {Exploring interlayer Dirac cone coupling in commensurately rotated few-layer graphene on SiC(000-1)},
author = {C. Mathieu and E. H. Conrad and F. Wang and J. E. Rault and V. Feyer and C. M. Schneider and O. Renault and N. Barrett},
journal= {arXiv preprint arXiv:1806.06559},
year = {2018}
}