Scaling of excitons in carbon nanotubes

Phys Rev Lett. 2004 Jun 25;92(25 Pt 1):257402. doi: 10.1103/PhysRevLett.92.257402. Epub 2004 Jun 25.


Light emission from carbon nanotubes is expected to be dominated by excitonic recombination. Here we calculate the properties of excitons in nanotubes embedded in a dielectric, for a wide range of tube radii and dielectric environments. We find that simple scaling relationships give a good description of the binding energy, exciton size, and oscillator strength.