▎ 摘　　要

The atomic structures, adsorption energies, and spin polarizations of lanthanide (Ln = La-Gd) atoms adsorbed on the single and double vacancies in graphene are investigated systematically by the first-principles calculations. The calculations show that the Ln atoms adsorb on the centers of the vacancies with large adsorption energies, in the range of 3.57 similar to 8.45 eV. The adsorbed Ln atoms also dope a large number of electrons into the graphene. Most of the Ln atoms are highly spin-polarized. The strong adsorption and high spin polarization gives these systems potential application in spintronic and catalyst materials. (C) 2017 Author(s).