Abstract
By using a simple method, the effects of a substitutional magnetic impurity on the conductance of metallic single-wall carbon nanotubes, lying between two spin-polarized electron reservoirs, are studied. It is demonstrated how the differential conductance depends sensitively on the radius and length of nanotube as well as the position of impurity. It is shown that magnetic impurity produces more effect for the spin-polarized current between the antiparallel reservoirs than the parallel ones.
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