▎ 摘　　要

On the basis of tight-binding model, the electron structure, free energy and spin-dependent transport of graphene with admixture of Cr atoms adsorbed on the surface are investigated. Geometrical optimization of crystal structure of graphene with Cr admixture is performed by means of free energy minimization. As revealed, the phenomenon of spin-dependent transport in graphene appears because of strong electron correlations caused by the presence of chromium atoms. The value of spin polarization of electron transport is determined by both the difference of partial densities of states of electrons with opposite projections of spins on Fermi levels and the difference of relaxation times caused by different occupation numbers of single-electron states of carbon and chromium. The value of spin polarization of electrical current grows with growing Cr-atoms' concentration.