Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2004-10-05
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Owing to errors of the calculation code, the numerical data shown in Figures are incorrect. Nonetheless, the corrected numeric
Scientific paper
10.1103/PhysRevB.72.045413
The conductance of telescoped double-wall nanotubes (TDWNTs) composed of two armchair nanotubes ($(n_O, n_O)$ and $(n_O-5, n_O-5)$ with $n_O \geq 10$) is calculated using the Landauer formula and a tight binding model. The results are in good agreement with the conductance calculated analytical by replacing each single-wall nanotube with a ladder, as expressed by $(2e^2/h)(T_+ + T_-)$, where $T_+$ and $T_-$ are the transmission rates of the symmetry and anti-symmetry channels, respectively. Perfect transmission in both channels is possible in this TDWNT when $n_O=10$, while $T_-$ is considerably small in the other TDWNTs. $T_-$ is particularly low when either $n_O$ or $n_O-5$ is a multiple of three. In this case, a three body effect of covalent-like interlayer bonds plays a crucial role in determining the finite $T_-$. When $n_O$ is a multiple of five, the five-fold symmetry increases $T_-$, although this effect diminishes with increasing $n_O$.
Haruyama Junji
Sawai Yoko
Tamura Ryo
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