Electronic structure and magnetic properties of cobalt intercalated in graphene on Ir(111)

H. Vita, St. Böttcher, P. Leicht, K. Horn, A. B. Shick, and F. Máca
Phys. Rev. B 90, 165432 – Published 22 October 2014

Abstract

Using a combination of photoemission and x-ray magnetic circular dichroism (XMCD), we characterize the growth and the electronic as well as magnetic structure of cobalt layers intercalated in between graphene and Ir(111). We demonstrate that magnetic ordering exists beyond one monolayer intercalation, and determine the Co orbital and spin magnetic moments. XMCD from the carbon edge shows an induced magnetic moment in the graphene layer, oriented antiparallel to that of cobalt. The XMCD experimental data are discussed in comparison to our results of first-principles electronic structure calculations. It is shown that good agreement between theory and experiment for the Co magnetic moments can be achieved when the local-spin-density approximation plus the Hubbard U (LSDA+U) is used.

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  • Received 22 August 2014

DOI:https://doi.org/10.1103/PhysRevB.90.165432

©2014 American Physical Society

Authors & Affiliations

H. Vita1, St. Böttcher1, P. Leicht2, K. Horn1, A. B. Shick3, and F. Máca3

  • 1Fritz-Haber-Institut der Max-Planck-Gesellschaft, Department of Physical Chemistry, Faradayweg 4-6, 14195 Berlin, Germany
  • 2Universität Konstanz, Fachbereich Physik, Universitätsstrasse 10, 78457 Konstanz, Germany
  • 3Institute of Physics ASCR, Na Slovance 2, 18221 Prague, Czech Republic

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Vol. 90, Iss. 16 — 15 October 2014

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