Chirality dependence of coherent phonon amplitudes in single-wall carbon nanotubes

A. R.T. Nugraha, G. D. Sanders, K. Sato, C. J. Stanton, M. S. Dresselhaus, R. Saito

研究成果: Article査読

12 被引用数 (Scopus)

抄録

We simulate the ultrafast dynamics of laser-induced coherent phonons in single-wall carbon nanotubes (SWNTs). In particular, we examine the coherent phonon amplitude of the radial breathing mode (RBM) as a function of excitation energy and chirality. We find that the RBM coherent phonon amplitudes are very sensitive to changes in excitation energy and are strongly chirality dependent. We discuss how the SWNT diameter changes in response to femtosecond laser excitation and under what conditions the diameter of a given SWNT will initially increase or decrease. An effective-mass theory for the electron-phonon interaction gives a physical explanation for these phenomena.

本文言語English
論文番号174302
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
84
17
DOI
出版ステータスPublished - 2011 11 11

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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