Artificially lattice-mismatched graphene/metal interface: Graphene/Ni/Ir(111)

Daniela Pacilé, Philipp Leicht, Marco Papagno, Polina M. Sheverdyaeva, Paolo Moras, Carlo Carbone, Konstantin Krausert, Lukas Zielke, Mikhail Fonin, Yuriy S. Dedkov, Florian Mittendorfer, Jörg Doppler, Andreas Garhofer, and Josef Redinger
Phys. Rev. B 87, 035420 – Published 22 January 2013

Abstract

We report on the structural and electronic properties of an artificial graphene/Ni(111) system obtained by the intercalation of a monatomic layer of Ni in graphene/Ir(111). Upon intercalation, Ni grows epitaxially on Ir(111), resulting in a lattice-mismatched graphene/Ni system. By performing scanning tunneling microscopy measurements and density functional theory calculations, we show that the intercalated Ni layer leads to a pronounced buckling of the graphene film. At the same time, an enhanced interaction is measured by angle-resolved photoemission spectroscopy, showing a clear transition from a nearly undisturbed to a strongly hybridized graphene π-band. A comparison of the intercalation-like graphene system with flat graphene on bulk Ni(111), and mildly corrugated graphene on Ir(111), allows us to disentangle the two key properties which lead to the observed increased interaction, namely lattice matching and electronic interaction. Although the latter determines the strength of the hybridization, we find an important influence of the local carbon configuration resulting from the lattice mismatch.

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  • Received 1 November 2012

DOI:https://doi.org/10.1103/PhysRevB.87.035420

©2013 American Physical Society

Authors & Affiliations

Daniela Pacilé1,2,*, Philipp Leicht3, Marco Papagno1,2, Polina M. Sheverdyaeva2, Paolo Moras2, Carlo Carbone2, Konstantin Krausert3, Lukas Zielke3, Mikhail Fonin3, Yuriy S. Dedkov4,†, Florian Mittendorfer5, Jörg Doppler5, Andreas Garhofer5, and Josef Redinger5

  • 1Dipartimento di Fisica, Università della Calabria, 87036 Arcavacata di Rende (CS), Italy
  • 2Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, Trieste, Italy
  • 3Fachbereich Physik, Universität Konstanz, 78457 Konstanz, Germany
  • 4Fritz-Haber-Institut der Max-Planck Gesellschaft, Faradayweg 4-6, 14159 Berlin, Germany
  • 5Institute for Applied Physics and Center for Computational Materials Science, Vienna University of Technology, 1040 Vienna, Austria

  • *daniela.pacile@fis.unical.it
  • Present address: SPECS Surface Nano Analysis GmbH, Berlin, Germany.

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Vol. 87, Iss. 3 — 15 January 2013

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