Electronic structure of potassium-doped carbon nanotubes

Takashi Miyake and Susumu Saito
Phys. Rev. B 65, 165419 – Published 5 April 2002
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Abstract

We present a density functional study of zigzag carbon nanotubes containing potassium atoms inside. We find that the effect of potassium doping is not simple charge transfer. The nearly free electron state of nanotube couples with the K4s orbital. The state comes downward as the tube is thicker and crosses the Fermi level when the diameter is as large as 0.81nm. It is distributed near the center of the tube and extends to the tube direction, which suggests high conductivity via this state.

  • Received 15 September 2001

DOI:https://doi.org/10.1103/PhysRevB.65.165419

©2002 American Physical Society

Authors & Affiliations

Takashi Miyake1 and Susumu Saito1,2

  • 1Department of Physics, Tokyo Institute of Technology 2-12-1 Oh-okayama, Meguro-ku, Tokyo 152-8551, Japan
  • 2Institute of Molecular Science, Myodaiji, Okazaki 444-8585, Japan

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Vol. 65, Iss. 16 — 15 April 2002

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