Controlling edge states of zigzag carbon nanotubes by the Aharonov-Bohm flux

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It has been known theoretically that localized states exist around zigzag edges of a graphite ribbon and of a carbon nanotube, whose energy eigenvalues are located between conduction and valence bands. We found that in metallic single-walled zigzag carbon nanotubes two of the localized states become critical, and that their localization length is sensitive to the mean curvature of a tube and can be controlled by the Aharonov-Bohm flux. The curvature induced mini-gap closes by the relatively weak magnetic field. Conductance measurement in the presence of the Aharonov-Bohm flux can give information about the curvature effect and the critical states.
5 pages, 4 figures

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Mesoscale and Nanoscale Physics, Materials Science

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http://salesiana.dossiersoluciones.com/handle/123456789/25709

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0501440
 http://arxiv.org/abs/cond-mat/0501440
 Phys. Rev. B 71, 195401 (2005)
 doi:10.1103/PhysRevB.71.195401

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arXiv