Study of charge dynamics in transparent single-walled carbon nanotube films

Details Study of charge dynamics in transparent single-walled carbon nanotube films Study of charge dynamics in transparent single-walled carbon nanotube films

2005-12-27

arxiv.org/abs/cond-mat/0512667v3

Physical Review B, 045431 (2006)

Physics

Condensed Matter

Materials Science

6 pages, 4 figures, submitted to Phys. Rev. B v3: Fig. 2 replaced, changes in caption of Table II, minor changes in text

Scientific paper

We report the transmission over a wide frequency range (far infrared - visible) of pristine and hole-doped, free-standing carbon nanotube films at temperatures between 50 K and 300 K. Optical constants are estimated by Kramers-Kronig analysis of transmittance. We see evidence in the far infrared for a gap below 10 meV. Hole doping causes a shift of spectral weight from the first interband transition into the far infrared. Temperature dependence in both the doped and undoped samples is restricted to the far-infrared region.

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