Quantum interference in deformed carbon nanotube waveguides

Details Quantum interference in deformed carbon nanotube waveguides Quantum interference in deformed carbon nanotube waveguides

2005-04-25

arxiv.org/abs/cond-mat/0504620v1

Physical Review B 70, 233407 (2004)

Physics

Condensed Matter

Materials Science

14 pages and 5 figures

Scientific paper

10.1103/PhysRevB.70.233407

Quantum interference (QI) in two types of deformed carbon nanotubes (CNTs), i.e., axially stretched and AFM tip-deformed CNTs, has been investigated by the pi-electron only and four-orbital tight-binding (TB) method. It is found that the rapid conductance oscillation (RCO) period is very sensitive to the applied strains, and decreases in an inverse proportion to the deformation degree, which could be used as a powerful experimental tool to detect precisely the deformation degree of the deformed CNTs. Also, the sigma-pi coupling effect is found to be negligible under axially stretched strain, while it works on the transport properties of the tip-deformed CNTs.

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