title: Structure and electronic properties of graphene nanoislands on Co(0001).
abstract: We have grown well-ordered graphene adlayers on the lattice-matched Co(0001) surface. Low-temperature scanning tunneling microscopy measurements demonstrate an on-top registry of the carbon atoms with respect to the Co(0001) surface. The tunneling conductance spectrum shows that the electronic structure is substantially altered from that of isolated graphene, implying a strong coupling between graphene and cobalt states. Calculations using density functional theory confirm that structures with on-top registry have the lowest energy and provide clear evidence for strong electronic coupling between the graphene pi-states and Co d-states at the interface.
authors.affiliation: Nanoscale Science and Engineering Center, Columbia University, New York, New York 10027, USA.
authors.forename: Daejin
authors.initials: D
authors.lastname: Eom
authors.forename: Deborah
authors.initials: D
authors.lastname: Prezzi
authors.forename: Kwang Taeg
authors.initials: KT
authors.lastname: Rim
authors.forename: Hui
authors.initials: H
authors.lastname: Zhou
authors.forename: Michael
authors.initials: M
authors.lastname: Lefenfeld
authors.forename: Shengxiong
authors.initials: S
authors.lastname: Xiao
authors.forename: Colin
authors.initials: C
authors.lastname: Nuckolls
authors.forename: Mark S
authors.initials: MS
authors.lastname: Hybertsen
authors.forename: Tony F
authors.initials: TF
authors.lastname: Heinz
authors.forename: George W
authors.initials: GW
authors.lastname: Flynn