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Nano Research

Article Title

Quasi-freestanding graphene on Ni(110): A graphene/metal contact with suppressed interface states

Keywords

graphene, electronic properties, synchrotron radiation, X-ray photoelectronspectroscopy, near-edge X-rayphotoelectron spectroscopy

Abstract

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.

Graphical Abstract

Publisher

Tsinghua University Press

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