Transport in nanostructures and nanotubes

被引：8
|
作者：
Ando, T [1 ]
Suzuura, H [1 ]
机构：
[1] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan
来源：
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2003年 / 18卷 / 1-3期
关键词：
honeycomb lattice; topological singularity; Berry's phase; anomaly;
D O I：
10.1016/S1386-9477(02)00966-9
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
in two-dimensional honeycomb lattices, electronic states are described by Weyl's equation for a massless neutrino when each site is occupied by an electron on average. The system has a topological singularity at the origin k = 0 of the wave vector, giving rise to nontrivial Berry's phase when k is rotated around the origin. The singularity causes discrete jumps in the conductivity at the energy corresponding to k = 0 in honeycomb lattices and leads to the absence of backscattering and a perfect conductance in carbon nanotubes. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：202 / 205
页数：4
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