Curvature-induced anisotropic spin-orbit splitting in carbon nanotubes

Details Curvature-induced anisotropic spin-orbit splitting in carbon nanotubes Curvature-induced anisotropic spin-orbit splitting in carbon nanotubes

2009-02-25

arxiv.org/abs/0902.4401v1

Phys. Rev. B 79, 235423 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We have theoretically explored the spin-orbit interaction in carbon nanotubes. We have found that, besides the dependence on chirality and diameter, the effects of spin-orbit coupling are anisotropic: spin splitting is larger for the higher valence or the lower electron band depending on the specific tube. Different tube behaviors can be grouped in three families, according to the so called chiral index. Curvature-induced changes in the orbital hybridization have a crucial role, and they are shown to be family-dependent. Our results explain recent experiments without invoking external fields.

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