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Effect of gold intercalation on the electronic structure of graphene on Co-Si/SiC(0001)
Russian version
DOI: 10.21883/PSS.2022.08.54637.337
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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