▎ 摘　　要

Based on ab initio calculations we discuss the Kondo effect due to a Co adatom on a graphene zigzag nanoribbon. A Co atom located at a hollow site behaves as a spin S = 1/2 impurity with d(xz) and d(yz) orbitals contributing to the magnetic moment. Dynamical correlations are analyzed with the use of complementary approximations: the mean field slave boson approach, noncrossing approximation, and equation-of-motion method. The impact of interplay between spin and orbital degrees of freedom together with the effect of peculiarities of electronic and magnetic structure of the nanoribbon on many-body resonances is examined.