Multilayer graphene, Moire patterns, grain boundaries and defects identified by scanning tunneling microscopy on the m-plane, non-polar surface of SiC Academic Article uri icon


  • 2014 Elsevier Ltd. All rights reserved. Epitaxial graphene is grown on a non-polar n+ 6H-SiC m-plane substrate and studied using atomic scale scanning tunneling microscopy. Multilayer graphene is found throughout the surface and exhibits rotational disorder. Moir patterns of different spatial periodicities are found, and we found that as the wavelength increases, so does the amplitude of the modulations. This relationship reveals information about the interplay between the energy required to bend graphene and the interaction energy, i.e. van der Waals energy, with the graphene layer below. Our experiments are supported by theoretical calculations which predict that the membrane topographical amplitude scales with the Moir pattern wavelength, L as L-1 + L-2.

published proceedings


author list (cited authors)

  • Xu, P., Qi, D., Schoelz, J. K., Thompson, J., Thibado, P. M., Wheeler, V. D., ... Peeters, P. M.

citation count

  • 17

complete list of authors

  • Xu, P||Qi, D||Schoelz, JK||Thompson, J||Thibado, PM||Wheeler, VD||Nyakiti, LO||Myers-Ward, RL||Eddy, CR Jr||Gaskill, DK||Neek-Amal, M||Peeters, PM

publication date

  • January 2014

published in