Electronic and Optical Properties of Narrow-Gap Carbon Nanotubes

F. L. Shyu, M. F. Lin

研究成果: Article同行評審

37 引文 斯高帕斯(Scopus)

摘要

The sp3 tight-binding model is used to calculate electronic structures of narrow-gap carbon nanotubes. The curvature effects cause a small energy gap, a one-dimensional parabolic bands, and a shift in the Fermi wave vector. The energy gap is described by the approximate relation Eg ≃ 5|Vppπ|b2 cos(3θ)/16Rd2. It is almost identical to the first-principles result. Due to the curvature effects, the optical spectra exhibit single-particle absorption peaks and a plasmon structure. They are consistent with the experimental results, the absorption peaks in the optical conductivity and the plasmon edge in the reflectance spectrum, thereby verifing the relation between Eg and (R d, θ).

原文English
頁(從 - 到)1820-1823
頁數4
期刊Journal of the Physical Society of Japan
71
發行號8
DOIs
出版狀態Published - 2002 八月

All Science Journal Classification (ASJC) codes

  • 物理與天文學 (全部)

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