Half metallicity in a zigzag double-walled nanotube nanodot: An ab initio prediction

A. J. Du, Z. H. Zhu, C. H. Sun, Y. Chen, G. Q. Lu, Sean C. Smith*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)

    Abstract

    Ab initio density functional calculations were performed to study finite-length zigzag (7, 0) @ (16, 0) double-walled carbon nanotubes (DWCNTs) with H-termination at the open ends. We find that such a DWCNT nanodot displays a very large magnetic moment at the zigzag edges and the ground state displays symmetric anti-ferromagnetic coupling. When an external electric field is applied along the direction of tube axis, a gap is opened for one spin channel, whereas another spin channel remains metallic, i.e. half metallicity occurs. Our results suggest an important new avenue for the development of CNT-based spintronic materials with enhanced properties.

    Original languageEnglish
    Pages (from-to)257-259
    Number of pages3
    JournalChemical Physics Letters
    Volume468
    Issue number4-6
    DOIs
    Publication statusPublished - 22 Jan 2009

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