Excitonic Effects and Optical Spectra of Single-Walled Carbon Nanotubes

Abstract

Many-electron effects often dramatically modify the properties of reduced dimensional systems. We report calculations, based on an many-electron Green's function approach, of electron-hole interaction effects on the optical spectra of small-diameter single-walled carbon nanotubes. Excitonic effects qualitatively alter the optical spectra of both semiconducting and metallic tubes. Excitons are bound by ~ 1 eV in the semiconducting (8,0) tube and by ~ 100 meV in the metallic (3,3) tube. These large many-electron effects explain the discrepancies between previous theories and experiments.

6 pages, 3 figures, 2 tables

References in corpus (2)

• The Ratio Problem in Single Carbon Nanotube Fluorescence Spectroscopy
• Detailed analysis of the mean diameter and diameter distribution of single wall carbon nanotubes from their optical response

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