Excitonic Effects and Optical Spectra of Single-Walled Carbon Nanotubes

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

Phys. Rev. Lett. 92, 077402 – Published 20 February 2004

Abstract

Many-electron effects often dramatically modify the properties of reduced dimensional systems. We report calculations, based on an ab initio 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 $\sim 1 e V$ in the semiconducting (8,0) tube and by $\sim 100 m e V$ in the metallic (3,3) tube. These large many-electron effects explain the discrepancies between previous theories and experiments.

Received 30 July 2003

DOI:https://doi.org/10.1103/PhysRevLett.92.077402

Authors & Affiliations

Catalin D. Spataru^1,2, Sohrab Ismail-Beigi^1,2, Lorin X. Benedict³, and Steven G. Louie^1,2

¹Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA
²Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
³H Division, Physics and Advanced Technologies Directorate, Lawrence Livermore National Laboratory, University of California, Livermore, California 94550, USA

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand

Issue

Vol. 92, Iss. 7 — 20 February 2004

Reuse & Permissions

Access Options

Author publication services for translation and copyediting assistance advertisement

Physical Review Letters