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Spin-polarized transport in carbon nanotubes with impurities

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  • H. Pan
  • T. H. Lin
  • D. Yu

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

Suggested Citation

  • H. Pan & T. H. Lin & D. Yu, 2005. "Spin-polarized transport in carbon nanotubes with impurities," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 47(3), pages 437-441, October.
    • Handle: RePEc:spr:eurphb:v:47:y:2005:i:3:p:437-441
    DOI: 10.1140/epjb/e2005-00334-9
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