Dresden 2003 – wissenschaftliches Programm

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PV: Plenarvorträge

PV IV

PV IV: Plenarvortrag

Mittwoch, 26. März 2003, 08:30–09:15, HSZ/01

Physics of Carbon Nanotubes — •Tsuneya Ando — Department of Physics, Tokyo Institute of Technology, 2–12–1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan

A carbon nanotube is composed of concentric tubes of rolled two-dimensional graphite sheets, on which hexagons are arranged in a helical fashion about the axis. The diameter of a multi-wall nanotube ranges from 20 to 300 Å and that of a single-wall nanotube lies between 7 and 16 Å. The maximum length of nanotubes exceeds 1 µm. Since the first discovery quite a number of studies have been reported on their electronic properties because of their unique topological structures. The purpose of this talk is to give a brief review on recent theoretical investigations on electronic and transport properties of carbon nanotubes.

The topics include an effective-mass description of electronic states and close relationship with neutrino physics, interaction effects on the band structure and optical spectra, absence of backward scattering except for scatterers with a potential range smaller than the lattice constant and some examples of related experiments of single-electron tunneling, the presence of a perfectly transmitting channel when several bands coexist at the Fermi level, and its sensitivity to the presence of inelastic scattering limiting the phase coherence length.