Cobalt intercalation at the graphene/iridium(111) interface: Influence of rotational domains, wrinkles, and atomic steps

Journal Article · Mon Mar 10 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4868119· OSTI ID:22257067

Vlaic, S.; Kimouche, A.; Coraux, J.; Rougemaille, N. ^[1]; Santos, B.; Locatelli, A. ^[2]

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1. CNRS, Inst NEEL, F-38042 Grenoble (France)
2. Elettra-Sincrotrone Trieste S.C.p.A., S.S: 14 km 163.5 in AREA Science Park, I-34149 Basovizza, Trieste (Italy)

Using low-energy electron microscopy, we study Co intercalation under graphene grown on Ir(111). Depending on the rotational domain of graphene on which it is deposited, Co is found intercalated at different locations. While intercalated Co is observed preferentially at the substrate step edges below certain rotational domains, it is mostly found close to wrinkles below other domains. These results indicate that curved regions (near substrate atomic steps and wrinkles) of the graphene sheet facilitate Co intercalation and suggest that the strength of the graphene/Ir interaction determines which pathway is energetically more favorable.

• OSTI ID: 22257067
• Journal Information: Applied Physics Letters, Vol. 104, Issue 10; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CLATHRATES
COBALT
CRYSTAL DEFECTS
GRAPHENE
IRIDIUM
SUBSTRATES