Conductance of nano-tube junctions and its scaling law

被引：12
|
作者：
Tamura, R
Tsukada, M
机构：
[1] Department of Physics, Graduate School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113
来源：
ZEITSCHRIFT FUR PHYSIK D-ATOMS MOLECULES AND CLUSTERS | 1997年 / 40卷 / 1-4期
关键词：
HELICALLY COILED CAGE; GRAPHITIC CARBON; ELECTRONIC-STRUCTURE; NEGATIVE-CURVATURE; TUBULES; STATES; FORMS; C-60;
D O I：
10.1007/s004600050245
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
The conductance is calculated by Landauer's formula with a simple tight binding model for junctions connecting two different metallic carbon nanotubes. These junctions are formed by a pair of disclinations, a 5-membered ring and a 7-membered ring, without dangling bonds. Conductances of about eight hundred kinds of junctions are obtained. The conductance is determined only by the ratio i/R where i is the distance between the two disclinations and R is the circumference of the thinner tube. When i/R much greater than 1, the conductance is found to be almost proportional to (i/R)(-3) Even when the Fermi energy is shifted by doping, an extended scaling law holds, so far as the channel number is kept two.
引用
收藏
页码：432 / 435
页数：4
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