Curvature effects in the band structure of carbon nanotubes including spin-orbit coupling

Curvature effects in the band structure of carbon nanotubes including spin-orbit coupling

The Kane-Mele model was previously used to describe effective spin-orbit couplings (SOCs) in graphene. Here we extend this model and also incorporate curvature effects to analyze the combined influence of SOC and curvature on the band structure of carbon nanotubes (CNTs). The extended model then rep...

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Veröffentlicht in:Journal of physics. Condensed matter 2015-11, Vol.27 (44), p.445501-445501
Hauptverfasser: Liu, Hong, Heinze, Dirk, Thanh Duc, Huynh, Schumacher, Stefan, Meier, Torsten
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band structure
carbon nanotube
spin-orbit coupling
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container_issue 44
container_start_page 445501
container_title Journal of physics. Condensed matter
container_volume 27
creator Liu, Hong
Heinze, Dirk
Thanh Duc, Huynh
Schumacher, Stefan
Meier, Torsten
description The Kane-Mele model was previously used to describe effective spin-orbit couplings (SOCs) in graphene. Here we extend this model and also incorporate curvature effects to analyze the combined influence of SOC and curvature on the band structure of carbon nanotubes (CNTs). The extended model then reproduces the chirality-dependent asymmetric electron-hole splitting for semiconducting CNTs and in the band structure for metallic CNTs shows an opening of the band gap and a change of the Fermi wave vector with spin. For chiral semiconducting CNTs with large chiral angle we show that the spin-splitting configuration of bands near the Fermi energy depends on the value of .
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subjects band structure
carbon nanotube
spin-orbit coupling
title Curvature effects in the band structure of carbon nanotubes including spin-orbit coupling
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