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

Vita, Hendrik; Böttcher, Stefan; Leicht, P.; Horn, Karsten; Shick, A. B.; Máca, F.

doi:10.1103/PhysRevB.90.165432

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

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Vita, Hendrik
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Böttcher, Stefan
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Horn, Karsten
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Vita, H., Böttcher, S., Leicht, P., Horn, K., Shick, A. B., & Máca, F. (2014). Electronic structure and magnetic properties of cobalt intercalated in graphene on Ir(111). Physical Review B, 90(16): 164532. doi:10.1103/PhysRevB.90.165432.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0024-3F3C-8

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.