Angle-resolved photoemission and X-ray diffraction experiments show that multilayer epitaxial graphene grown on the SiC(000-1) surface is a new form of carbon that is composed of effectively isolated graphene sheets. The unique rotational stacking of these films cause adjacent graphene layers to electronically decouple leading to a set of nearly independent linearly dispersing bands (Dirac cones) at the graphene K-point. Each cone corresponds to an individual macro-scale graphene sheet in a multilayer stack where AB-stacked sheets can be considered as low density faults.
@article{arxiv.0907.5222,
title = {First direct observation of a nearly ideal graphene band structure},
author = {M. Sprinkle and D. Siegel and Y. Hu and J. Hicks and P. Soukiassian and A. Tejeda and A. Taleb-Ibrahimi and P. Le Fèvre and F. Bertran and C. Berger and W. A. de Heer and A. Lanzara and E. H. Conrad},
journal= {arXiv preprint arXiv:0907.5222},
year = {2015}
}