Chirality dependence of Raman intensity of single wall cabon nanotubes

ORAL

Abstract

We present calculated Raman intensity of radial breathing modes (RBM), and other first and second order Raman signals as a function of (n,m) with exciton wavefunctions. Because of strong k dependent electron-phonon and electron-photon matrix elements, the Raman intensity shows (2n+m) family pattern. Within the extended tight binding calculation, we make exciton Kataura-plot for RBM. The Raman intensity is enhanced by localized wavefunction of the bright exciton which decreases with increasing energy and diameter. We will further discuss disorder induced D-band Raman intensity with some experimental results.

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Authors

  • Riichiro Saito

  • J. Jiang

    Tohoku Univ., Tohoku University

  • Kentaro Sato

    Tohoku UNIV. and CREST JST

  • Ado Jorio

    UFMG, Brazil, UFMG

  • Georgii Samsonidze

  • Grace Chou

    Chemistry, MIT

  • Gene Dresselhaus

    Francis Bitter Magnet Laboratory, MIT, MIT, USA

  • Mildred S. Dresselhaus

    MIT - USA, Massachusetts Institute of Technology, MIT, USA, EECS/Physics, MIT, MIT