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Resonances and rotation symmetries in the conductance of armchair carbon nanotubes with extended defect pairs
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
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2005 (English)In: Physical Review B Condensed Matter, ISSN 0163-1829, Vol. 72, no 15, 153405-1 p.Article in journal (Refereed) Published
Abstract [en]

The influence on the conductance of armchair carbon nanotubes due to the presence of extended vacancy pairs has been investigated using a conventional pi-electron tight-binding model. It is found that the conductance in the linear band region around the Fermi energy contains resonance peaks and dips, which can be understood as double-barrier scattering resonances and Fano antiresonances and whose number depends on the longitudinal intervacancy separation. Furthermore, for a given longitudinal intervacancy separation, only two distinctly different conductance spectra appear in this energy region as the second vacancy in the pair assumes all different lateral positions around the tube circumference. It is also found that the conductance can be very sensitive to minimal changes in the relative intervacancy positions.

Place, publisher, year, edition, pages
2005. Vol. 72, no 15, 153405-1 p.
Keyword [en]
nanotubes, coherent transport
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:miun:diva-3457DOI: 10.1103/PhysRevB.72.153405ISI: 000232934400030Local ID: 3522OAI: oai:DiVA.org:miun-3457DiVA: diva2:28489
Available from: 2008-09-30 Created: 2009-07-13Bibliographically approved

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