Aharanov-Bohm effect for the edge states of zigzag carbon nanotubes

Details Aharanov-Bohm effect for the edge states of zigzag carbon nanotubes Aharanov-Bohm effect for the edge states of zigzag carbon nanotubes

2007-10-21

arxiv.org/abs/0710.3904v1

Phys. Rev. B 77, 045138 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 4 figures

Scientific paper

10.1103/PhysRevB.77.045138

Two delocalized states of metallic zigzag carbon nanotubes near the Dirac point can be localized by the Aharanov-Bohm magnetic field around 20 Tesla. The dependence of the localization on the length and diameter of the nanotubes shows that the localization-delocalization transition can be observed for 2 nm diameter tube. The mechanism of the localization is explained in terms of the deformation-induced gauge field, which shows a topological nature of the localization. The transition from the delocalized states to the localized states can be observed by scanning tunneling microscopy and spectroscopy. A similarity between the transition and the spin Hall effect is discussed.

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