▎ 摘　　要

We investigated the surface atomic structure of a graphene layer grown on a single-crystal Cu(111) surface by using a chemical vapor deposition method. The low-energy electron diffraction pattern shows a clear ring structure, which indicates the existence of multiple domains with different in-plane orientations. In the scanning tunneling microscopy experiment, two domains showing different Moire patterns and a domain boundary between them are observed. The misorientation angle between the domains could be estimated from the quantum interference pattern around the domain boundary and the atom-resolved image of each domain.