Adatoms in Graphene
  We review the problem of adatoms in graphene under two complementary points of view, scattering theory and strong correlations. We show that in both cases impurity atoms on the graphene surface present effects that are absent in the physics of impurities in ordinary metals. We discuss how to observe these unusual effects with standard experimental probes such as scanning tunneling microscopes, and spin susceptibility. 
Antonio H. Castro Neto, Valeri N. Kotov, Johan Nilsson, Vitor M.   Pereira, Nuno M. R. Peres, Bruno Uchoa