Influence of excited electron lifetimes on the electronic structure of carbon nanotubes

Details Influence of excited electron lifetimes on the electronic structure of carbon nanotubes Influence of excited electron lifetimes on the electronic structure of carbon nanotubes

1999-11-19

arxiv.org/abs/cond-mat/9911302v1

Physics

Condensed Matter

Materials Science

6 pages, 4 figures

Scientific paper

10.1016/S0009-2614(00)00256-6

We have studied the dynamics of electrons in single wall carbon nanotubes using femtosecond time-resolved photoemission. The lifetime of electrons excited to the pi* bands is found to decrease continuously from 130 fs at 0.2 eV down to less than 20 fs at energies above 1.5 eV with respect to the Fermi level. This should lead to a significant lifetime--induced broadening of the characteristic van Hove singularities in the nanotube DOS.

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