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Excitonic Effects and Optical Spectra of Single-Walled Carbon Nanotubes

Catalin D. Spataru·Sohrab Ismail-Beigi·Lorin X. Benedict·Steven G. Louie
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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.

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Catalin D. Spataru, Sohrab Ismail-Beigi, Lorin X. Benedict, Steven G. Louie. 2004-08-12. Excitonic Effects and Optical Spectra of Single-Walled Carbon Nanotubes. https://doi.org/10.1103/physrevlett.92.077402

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