Spin‐Resolved PES and IPES Investigation of the Graphene/Ni(111) Interface

Spin‐Resolved PES and IPES Investigation of the Graphene/Ni(111) Interface IntroductionThe protection of metal surfaces is a thorny physical and chemical problem since Schönbein succeeded to keep iron inert in nitric acid in the mid of 1800. This discovery has revolutionized the transition metal technology. Apart from traditional chemical passivation strategies with oxygen. the discovery of graphene (Gr) opens the route toward a novel approach. The Gr passivation efficiency depends on the substrate chemistry: for instance, while Ni is well protected, Cu shows a more complex reactivity. The chemically inert Gr/Ni system, where Gr shows a nearly perfect lattice matching with the Ni(111) surface, has been proposed for the protection of thin films, or even more exotic systems, such as metal foams.The Gr/Ni interface represents, therefore, a prototypical system for the study of Gr growth on a strongly interacting metal. In addition, Ni(111) represents an intriguing substrate due to its magnetic properties. According to first principles calculations, hybridization between Gr 2p and Ni 3d electronic states should reduce the magnetization of the topmost Ni layers and induce alternating magnetic moments in C atoms, depending on their adsorption registry. While photoemission studies addressing the spin‐polarization of Gr π states away from the Dirac point [the K¯ point of the Gr http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physica Status Solidi (B) Basic Solid State Physics Wiley

Spin‐Resolved PES and IPES Investigation of the Graphene/Ni(111) Interface

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Publisher
Wiley Subscription Services, Inc., A Wiley Company
Copyright
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
ISSN
0370-1972
eISSN
1521-3951
D.O.I.
10.1002/pssb.201700415
Publisher site
See Article on Publisher Site

Abstract

IntroductionThe protection of metal surfaces is a thorny physical and chemical problem since Schönbein succeeded to keep iron inert in nitric acid in the mid of 1800. This discovery has revolutionized the transition metal technology. Apart from traditional chemical passivation strategies with oxygen. the discovery of graphene (Gr) opens the route toward a novel approach. The Gr passivation efficiency depends on the substrate chemistry: for instance, while Ni is well protected, Cu shows a more complex reactivity. The chemically inert Gr/Ni system, where Gr shows a nearly perfect lattice matching with the Ni(111) surface, has been proposed for the protection of thin films, or even more exotic systems, such as metal foams.The Gr/Ni interface represents, therefore, a prototypical system for the study of Gr growth on a strongly interacting metal. In addition, Ni(111) represents an intriguing substrate due to its magnetic properties. According to first principles calculations, hybridization between Gr 2p and Ni 3d electronic states should reduce the magnetization of the topmost Ni layers and induce alternating magnetic moments in C atoms, depending on their adsorption registry. While photoemission studies addressing the spin‐polarization of Gr π states away from the Dirac point [the K¯ point of the Gr

Journal

Physica Status Solidi (B) Basic Solid State PhysicsWiley

Published: Jan 1, 2018

Keywords: ; ; ;

References

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