Single 3d transition metal atoms on multi-layer graphene systems: electronic configurations, bonding mechanisms and role of the substrate

0432547 - FZÚ 2015 RIV DE eng J - Článek v odborném periodiku
Sessi, V. - Stepanow, S. - Rudenko, A.N. - Krotzky, S. - Kern, K. - Hiebel, F. - Mallet, P. - Veuillen, J.-Y. - Šipr, Ondřej - Honolka, Jan - Brookes, N.B.
Single 3d transition metal atoms on multi-layer graphene systems: electronic configurations, bonding mechanisms and role of the substrate.
New Journal of Physics. Roč. 16, Jun (2014), 1-11. ISSN 1367-2630. E-ISSN 1367-2630
Grant CEP: GA ČR(CZ) GAP108/11/0853
Institucionální podpora: RVO:68378271
Klíčová slova: graphene * magnetic adsorbates * x-ray absorption spectroscopy * surface magnetism
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 3.558, rok: 2014

The electronic configurations of Fe, Co, Ni and Cu adatoms on graphene and graphite have been studied by x-ray magnetic circular dichroism and charge transfer multiplet theory. A delicate interplay between long-range interactions and local chemical bonding is found to influence the adatom equilibrium distance and magnetic moment. The results for Fe and Co are consistent with purely physisorbed species having, however, different 3d-shell occupations on graphene and graphite (dn+1 and dn, respectively). On the other hand, for the late 3d metals Ni and Cu a trend towards chemisorption is found, which strongly quenches the magnetic moment on both substrates.
Trvalý link: http://hdl.handle.net/11104/0236917