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

页码：202 / 205

页数：4

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