Effects of geometric structures and temperature on electronic properties of double-walled armchair carbon nanotubes

研究成果: Article同行評審

摘要

Electronic structures of armchair double-walled carbon nanotubes are calculated by the tight-binding model. The energy dispersions near Fermi level are significantly affected by the translation and rotation between the inner and outer nanotubes. There are intersecting linear bands or parabolic bands with energy spacings in the low energy region. The main characteristics of the subbands would be directly reflected in the density of states and the optical excitations. The absorption frequencies come from the energies between the band-edge states, and the low-frequency optical absorptions would be further modulated by temperature. Several absorption peaks might be created at finite temperature due to the variations on the carrier concentration near the Fermi level. The calculated results would be useful to examine the effects of nanotube configurations and temperature on the electronic properties.

原文English
頁(從 - 到)1550-1553
頁數4
期刊Diamond and Related Materials
17
發行號7-10
DOIs
出版狀態Published - 2008 七月 1

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 化學 (全部)
  • 機械工業
  • 材料化學
  • 電氣與電子工程

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