Magnetic impurity effects in metallic carbon nanotubes: local non-Fermi liquid theory

Magnetic impurity effects on metallic carbon nanotubes are studied theoretically. The resolvent method for the multichannel Kondo effect is applied to the band structure of the k . p perturbation Hamiltonian in the limit of infinite onsite repulsion at the impurity site. We discuss the local non-Fermi liquid behaviour at temperatures below the Kondo temperature T(K). The density of states of localized electrons has a singularity at about \w\(1/2), which gives rise to a pseudogap at the Kondo resonance at low temperatures. The temperature dependence of the electronic resistivity is predicted to be T(1/2), and the imaginary part of the dynamical susceptibilities is dependent on \w\(1/2). Possible experimental observations are discussed.