Open AccessThe effects of both length and tube-diameter on the conductance of single-walled carbon nanotubes
Author(s) -
Tang Na-Si,
Xiaohong Yan,
Ding Jian-Wen
Publication year - 2005
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.54.333
Subject(s) - carbon nanotube , zigzag , conductance , materials science , ballistic conduction in single walled carbon nanotubes , curvature , ballistic conduction , tight binding , fermi level , nanotechnology , band gap , nanotube , condensed matter physics , mechanical properties of carbon nanotubes , electronic structure , optoelectronics , physics , geometry , mathematics , quantum mechanics , electron
Based on the tight-binding model, we develop a transfer-matrix method to study the electronic conductance of single-walled carbon nanotubes. It is found that there exists a narrow conductance gap in metallic zigzag nanotubes corresponding to the curvature-induced energy gap. In addition, the conductance near the Fermi level depends on both the diameter and the length of the carbon nanotube. Moreover, ballistic, diffused or classical transport may be found in carbon nanotubes with variation of energy.