Magnetic impurity effects in metallic carbon nanotubes: local non-Fermi liquid theory
Kikuo Harigaya
Abstract
Magnetic impurity effects on metallic carbon nanotubes are studied theoretically. The resolvent method for the multi channel Kondo effect is applied to the band structure of the kp perturbation hamiltonian in the limit of the infinite onsite repulsion at the impurity site. We discuss the local non-Fermi liquid behavior at temperatures lower than the Kondo temperature TK. The density of states of localized electron has a singularity |omega|1/2 which gives rise to a pseudo gap at the Kondo resonance in low temperatures. The temperature dependence of the electronic resistivity is predicted as T1/2, and the imaginary part of dynamical susceptibilities has the |omega|1/2 dependence. Possible experimental observations are discussed.
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