LATTICE DISTORTION OF METALLIC CARBON NANOTUBES INDUCED BY MAGNETIC-FIELDS

被引:53
作者
AJIKI, H
ANDO, T
机构
[1] Institute for Solid State Physics, University of Tokyo, Tokyo 106, 7-22-1 Roppongi, Minato-ku
关键词
GRAPHITE; CARBON NANOTUBE; FULLERENE TUBE; PEIERLS DISTORTION;
D O I
10.1143/JPSJ.64.260
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A lattice instability toward in-plane Kekule and out-of-plane distortions is studied for metallic carbon nanotubes in a magnetic field perpendicular to the tube axis using a k.p approximation. A strong magnetic field drastically enhances the distortion for the nanotubes with larger circumference and leads to a gap almost independent of an Aharonov-Bohm magnetic flux passing through the cross section. For the Kekule distortion, in particular, the gap increases with the circumference length and approaches a value smaller than that of a 2D graphite sheet by a factor of 2/pi.
引用
收藏
页码:260 / 267
页数:8
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