Kondo effect of magnetic impurities on nanotubes

► Ab initio calculation of Co and Fe impurities on (4,4) and (8,8) carbon nanotubes. ► Energy-dependent conductance and phase shifts. ► Construction of generalized Anderson impurity model. ► Solution of the model by numerical renormalization group. ► Kondo temperatures of ∼1K for Co and ∼1mK for Fe.