▎ 摘　　要

The ab initio calculations of the electronic structure of low-dimensional graphene-iron-nickel and graphene-silicon-iron systems were carried out using the density functional theory. For the graphene-Fe-Ni(111) system, band structures for different spin projections and total densities of valence electrons are determined. The energy position of the Dirac cone caused by the p (z) states of graphene depends weakly on the number of iron layers intercalated into the interlayer gap between nickel and graphene. For the graphene-Si-Fe(111) system, the most advantageous positions of silicon atoms on iron are determined. The intercalation of silicon under graphene leads to a sharp decrease in the interaction of carbon atoms with the substrate and largely restores the electronic properties of free graphene.