Aharonov-Bohm differential conductance modulation in defective metallic single-wall carbon nanotubes

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dc.creatorBagheri, Mehran
dc.date2007-09-16
dc.date2008-02-04
dc.date.accessioned2026-07-07T09:18:07Z
dc.date.available2026-07-07T09:18:07Z
dc.descriptionUsing a perturbative approach, the effects of the energy gap induced by the Aharonov-Bohm (AB) flux on the transport properties of defective metallic single-walled carbon nanotubes (MSWCNTs) are investigated. The electronic waves scattered back and forth by a pair of impurities give rise to Fabry-Perot oscillations which constitutes a coherent backscattering interference pattern (CBSIP). It is shown that, the CBSIP is aperiodically modulated by applying a magnetic field parallel to the nanotube axis. In fact, the AB-flux brings this CBSIP under control by an additional phase shift. As a consequence, the extrema as well as zeros of the CBSIP are located at the irrational fractions of the quantity $Φ_ρ=Φ/{Φ_0}$, where $Φ$ is the flux piercing the nanotube cross section and $Φ_{0}=h/e$ is the magnetic quantum flux. Indeed, the spacing between two adjacent extrema in the magneto-differential conductance (MDC) profile is decreased with increasing the magnetic field. The faster and higher and slower and shorter variations is then obtained by metallic zigzag and armchair nanotubes, respectively. Such results propose that defective metallic nanotubes could be used as magneto-conductance switching devices based on the AB effect.
dc.description11 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0709.2480
dc.identifierhttp://arxiv.org/abs/0709.2480
dc.identifierJ. Phys.: Condens. Matter, 20, 075227(2008)
dc.identifierdoi:10.1088/0953-8984/20/7/075227
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/153914
dc.subjectMesoscale and Nanoscale Physics
dc.titleAharonov-Bohm differential conductance modulation in defective metallic single-wall carbon nanotubes
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