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Phys Rev Lett. 2004 Jun 25;92(25 Pt 1):257402. Epub 2004 Jun 25.

Scaling of excitons in carbon nanotubes.

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IBM Research Division, T. J. Watson Research Center, Yorktown Heights, NY 10598, USA.


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.

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