Angle-resolved photoemission spectroscopy, low-energy electron diffraction, and density functional theory calculations were employed to investigate the electronic and structural properties of a graphene layer grown on the regularly stepped Pt(997) surface. The measurements show the predominance of a (2×2) multidomain superstructure of graphene, lying flat on the Pt terraces and covering the step edges in a carpetlike mode. The linearly dispersing π band of graphene appears to be weakly affected by the substrate at the K point, while an appreciable hybridization is found at the Γ point. Replicas of the Dirac cone are seen perpendicularly to the steps, with double real-space periodicity compared to the Pt terrace width.
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Titolo: | Electronic structure of epitaxial graphene grown on stepped Pt(997) |
Autori: | |
Data di pubblicazione: | 2014 |
Rivista: | |
Handle: | http://hdl.handle.net/20.500.11770/138202 |
Appare nelle tipologie: | 1.1 Articolo in rivista |