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

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

2007-09-16

arxiv.org/abs/0709.2480v2

J. Phys.: Condens. Matter, 20, 075227(2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 4 figures

Scientific paper

10.1088/0953-8984/20/7/075227

Using 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 $\Phi_\rho={\Phi}/{\Phi_0}$, where $\Phi$ is the flux piercing the nanotube cross section and $\Phi_{0}=h/e$ 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.

Affiliated with

Also associated with

No associations

Rating

Aharonov-Bohm differential conductance modulation in defective metallic single-wall carbon nanotubes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Aharonov-Bohm differential conductance modulation in defective metallic single-wall carbon nanotubes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Aharonov-Bohm differential conductance modulation in defective metallic single-wall carbon nanotubes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-478047