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Structural dependence of exciton in carbon nanotubes

Author

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  • Y. Jia
  • G. Yu
  • J. Dong

Abstract

The binding energies and sizes of excitons, and energy splitting of the bright-dark excitons in single-walled carbon nanotubes have been calculated using the nonorthogonal tight-binding model, supplemented by the long-range Coulomb interaction. It is found that the binding energies and the sizes of excitons not only depend on tube's diameter d, but also its chirality. However, the splitting of the bright-dark excitons mostly depends on 1/d 2 . Our obtained results show that the curvature effect is very important for the exciton excitations in the SWNTs, especially in the smaller diameter ones. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2008

Suggested Citation

  • Y. Jia & G. Yu & J. Dong, 2008. "Structural dependence of exciton in carbon nanotubes," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 61(4), pages 433-439, February.
    • Handle: RePEc:spr:eurphb:v:61:y:2008:i:4:p:433-439
    DOI: 10.1140/epjb/e2008-00104-3
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