Effective mass theory of carbon nanotubes with vacancies in magnetic fields

An effective-mass theory is developed on transport of non-doped carbon nanotubes with local and short-range impurities in the presence of a magnetic field. The conductance is shown to be scaled completely by the field component in the direction of impurities. In a weak-field regime, the conductance...

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Bibliographic Details
Published in:Journal of the Physical Society of Japan 2001-02, Vol.70 (2), p.481-491
Main Authors: IGAMI, Masatsura, NAKANISHI, Takeshi, ANDO, Tsuneya
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electrical properties of specific thin films
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Exact sciences and technology
Nanotubes
Physics
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Summary:An effective-mass theory is developed on transport of non-doped carbon nanotubes with local and short-range impurities in the presence of a magnetic field. The conductance is shown to be scaled completely by the field component in the direction of impurities. In a weak-field regime, the conductance strongly depends on strength of potential and the difference in the number of impurities at A and B sublattices δ NAB. In a strong-field limit, the conductance is reduced to e2/π\hbar if impurities exist only on A or B sublattices and vanishes in all other cases. These results are intuitively understood by localized charge distribution of the wave function in magnetic fields.
ISSN:0031-9015
1347-4073
DOI:10.1143/jpsj.70.481