π-electronic excitations in multiwalled carbon nanotubes

Feng Lin Shyu, Ming Fa Lin

Research output: Contribution to journalArticlepeer-review

Abstract

The π-electronic excitations of the 3D (2D) multiwalled carbon nanotube bundles (arrays) are studied within the linear response approximation. The longitudinal dielectric function exhibits a peak or diplike structure at the neighborhood of ω = 2γ00 is the resonance integral). This special structure induces a pronounced π-plasmon peak in the loss function. The π-plasmon frequency and the oscillator strength of collective excitations are significantly affected by the direction and the magnitude of the transferred momentum, the number of shells in a multiwalled nanotube, and the dimensionalities of the coupled multiwalled nanotube systems. On the other hand, they are insensitive to the electronic structure of the single-walled carbon nanotube (or the chiral angle) and the slight change of the shell number. The predicted π-plasmon characteristics could be experimentally checked with EELS or optical spectra.

Original languageEnglish
Pages (from-to)3806-3809
Number of pages4
JournalJournal of the Physical Society of Japan
Volume68
Issue number12
DOIs
Publication statusPublished - 1999 Dec

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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