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Helical modes in carbon nanotubes generated by strong electric fields

Klinovaja, Jelena and Schmidt, Manuel J. and Braunecker, Bernd and Loss, Daniel. (2011) Helical modes in carbon nanotubes generated by strong electric fields. Physical review letters, 106 (15). p. 156809.

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Official URL: http://edoc.unibas.ch/dok/A6338779

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Abstract

Helical modes, conducting opposite spins in opposite directions, are shown to exist in metallic armchair nanotubes in an all-electric setup. This is a consequence of the interplay between spin-orbit interaction and strong electric fields. The helical regime can also be obtained in chiral metallic nanotubes by applying an additional magnetic field. In particular, it is possible to obtain helical modes at one of the two Dirac points only, while the other one remains gapped. Starting from a tight-binding model we derive the effective low-energy Hamiltonian and the resulting spectrum.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretical Nano/Quantum Physics (Klinovaja)
05 Faculty of Science > Departement Physik > Physik > Theoretische Physik Mesoscopics (Loss)
UniBasel Contributors:Klinovaja, Jelena and Loss, Daniel
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
ISSN:0031-9007
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:05 Apr 2022 08:06
Deposited On:10 Apr 2015 09:12

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