Effect of gold intercalation on the electronic structure of graphene on Co-Si/SiC(0001)
Rybkina A. A. 1, Filnov S. O. 1, Glazkova D. A.1, Vilkov O. Yu. 1, Bokai K. A. 1, Pudikov D. A. 1, Shikin A. M. 1, Rybkin A. G. 1
1St. Petersburg State University, St. Petersburg, Russia
Email: a.rybkina@spbu.ru

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Graphene grown on an ultrathin CoSi/CoSi2 silicide layer atop a SiC(0001) substrate and intercalated by Au was studied. Intercalation of Au was found to occur at a temperature of 500oC, and it is accompanied by the formation of gold silicide under graphene with a stoichiometry close to Au2Si. The study of the electronic structure of the system in the region of the (K) point of the surface Brillouin zone revealed the quasi-freestanding character of graphene with a linear spectrum of π states and a Dirac point near the Fermi level. Photoelectron microscopy revealed the homogeneity of the work function along the surface of the sample on a micrometer scale. Keywords: Graphene, magneto-spin-orbit graphene, intercalation, photoelectron spectroscopy, electronic structure.
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