Magnetic-field effects on the electronic transport properties of a carbon nanotube with a side-coupled magnetic impurity

We study the Kondo effect presented by single-wall carbon nanotubes (CNTs). A zigzag CNT of diameter D is considered with a magnetic impurity side-coupled to its surface, and under the effect of a magnetic field applied parallel to the axial direction. To describe the Kondo resonance we employ the atomic approach developed previously. A tight-binding approximation is used to calculate the CNT Green's functions in the presence of a magnetic field B-bar . Here, we study the rising of the Kondo effect when the magnetic field induces an insulator-metal transition in a semiconducting CNT, i.e., for a magnetic flux equal to 13 flux quantum (φ0). Results of the electronic density of states that characterize well the structure of the Kondo peak are presented