We report preparation of large area quasi-1D monolayer graphene superlattices on a prototypical high index surface Cu(410)-O and characterization by Raman spectroscopy, Auger electron spectroscopy (AES), low energy electron diffraction (LEED), scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS). The periodically stepped substrate gives a 1D modulation to graphene, forming a superlattice of the same super-periodicity. Consequently the moire pattern is also quasi-1D, with a different periodicity. Scanning tunneling spectroscopy measurements revealed new Dirac points formed at the superlattice Brillouin zone boundary as predicted by theories.
@article{arxiv.1402.4055,
title = {Quasi-1D graphene superlattices formed on high index surfaces},
author = {Chenfang Lin and Xiangqian Huang and Fen Ke and Chenhao Jin and Nai Tong and Xiuli Yin and Lin Gan and Xuefeng Guo and Ruguang Zhao and Weisheng Yang and Enge Wang and Zonghai Hu},
journal= {arXiv preprint arXiv:1402.4055},
year = {2015}
}