Exciton transport and exchange self-energy in semiconducting carbon nanotubes

ORAL

Abstract

We present direct measurements of $S_1$ exciton transport in (6,5) carbon nanotubes. Exciton diffusion lengths associated with end quenching, photoluminescence lifetimes, and homogeneous emission linewidths provide a basis for determining an intrinsic diffusion constant of 5 cm$^2$s$^{-1}$ within the dispersion of light. Exciton diffusion is modeled in terms of an anomalous dispersion within a marginal Fermi liquid description of the exciton exchange self-energy and acoustic phonon scattering.

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Authors

  • Jared Crochet

    • Los Alamos National Laboratory

  • Jay Sau

    • Harvard University

  • Marvin Cohen

    • University of California at Berkeley and Lawrence Berkeley National Laboratory

  • Juan Duque

    • Los Alamos National Laboratory

  • Laurent Cognet

    • Universite de Bordeaux and CNRS

  • Stephen Doorn

    • Los Alamos National Laboratory