Abstract
Scanning tunneling microscopy is used to study intercalation of cobalt underneath a graphene layer on Ru(0001) . Deposition of cobalt on graphene/ Ru(0001) at 873 K leads to the intercalation of cobalt between the graphene layer and the Ru(0001) substrate, and the intercalation is associated with Co diffusion at steps and defects. The morphology of graphene/ Co/Ru(0001) shows moiré pattern, as same as that of graphene/ Ru(0001) . The bright areas where Co islands exist are hcp regions of graphene/ Ru(0001) . The intercalated Co islands have a pseudomorphic structure superimposed on Ru(0001) .
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