Quasi-freestanding graphene on Ni(110): A graphene/metal contact with suppressed interface states
graphene, electronic properties, synchrotron radiation, X-ray photoelectronspectroscopy, near-edge X-rayphotoelectron spectroscopy
Graphene/Ni(110) has been studied by time-resolved X-ray photoelectronspectroscopy and near-edge X-ray absorption fine structure. The C 1s core levelshows a splitting typical of periodically rippled interfaces. The analysis of the CK-edge reveals that the interface states previously observed for graphene/Ni(111)are suppressed in graphene/Ni(110). This suppression is due to the reducedhybridization of the Dirac-cone electrons in graphene with the d-bands of the(110)-oriented nickel contacts. Our results show that, contrary to commensurategrowth of graphene on Ni(111), epitaxially grown graphene on Ni(110) behavesas a quasi-freestanding sheet, as the lattice mismatch gives rise to a moiréreconstruction.
Tsinghua University Press
Antonio Politano, Quasi-freestanding graphene on Ni(110): A graphene/metal contact with suppressed interface states. NanoRes.2016, 9(6): 1795–1800