Persistent currents in finite zigzag carbon nanotubes

Magnetic properties of finite zigzag carbon nanotubes are studied within the tight-binding model. The spin– B interaction (Zeeman splitting) causes the metal–semiconductor transition and thus produces a large persistent current ( J) with special jump structures. This effect makes all zigzag carbon n...

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Bibliographic Details
Published in:Carbon (New York) 2004, Vol.42 (14), p.2873-2878
Main Authors: Chen, R.B., Lu, B.J., Tsai, C.C., Chang, C.P., Shyu, F.L., Lin, M.F.
Format: Article
Language:English
Subjects:
A. Carbon nanotubes
Cross-disciplinary physics: materials science
rheology
D. Magnetic properties
Exact sciences and technology
Fullerenes and related materials
diamonds, graphite
Materials science
Physics
Specific materials
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Summary:Magnetic properties of finite zigzag carbon nanotubes are studied within the tight-binding model. The spin– B interaction (Zeeman splitting) causes the metal–semiconductor transition and thus produces a large persistent current ( J) with special jump structures. This effect makes all zigzag carbon nanotubes exhibit a gigantic paramagnetism. It also destroys the periodicity of magnetic properties. The dependence on the magnetic flux, the length ( w), the radius ( r), the temperature ( T), and the chirality (zigzag or armchair) is strong. The amplitude of J quickly decreases with increasing of ( w, r, T). Zigzag carbon nanotubes differ significantly from armchair carbon nanotubes (or infinite zigzag carbon nanotubes) in features such as magnetic susceptibility and in special structures in J.
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2004.06.033