Spin-polarized transport in carbon nanotubes with impurities

H. Pan (), T. H. Lin and D. Yu

The European Physical Journal B: Condensed Matter and Complex Systems, 2005, vol. 47, issue 3, 437-441

Abstract: Impurity effects on the spin-polarized transport through armchair carbon nanotubes contacted by ferromagnetic leads are investigated theoretically. The length of the nanotube can cause on-resonance and off-resonance behaviors of the spin-coherent transport. The impurity suppresses the conductance for the on-resonance case, while it enhances the conductance for the off-resonance one. With increasing impurity strength, the tunnel magnetoresistance exhibits a maximum or minimum value for the on-resonance or off-resonance case, respectively. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2005

Date: 2005
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DOI: 10.1140/epjb/e2005-00334-9

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