Transport in nanostructures and nanotubes

✍ Scribed by Tsuneya Ando; Hidekatsu Suzuura

• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 149 KB
• Volume: 18
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/s1386-9477(02)00966-9

✦ Synopsis

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.