Excitonic effects and optical spectra of single-walled carbon nanotubes
Journal Article
·
· Physical Review Letters
OSTI ID:840883
- LBNL Library
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 {approx}1 eV in the semiconducting (8,0) tube and by {approx}100 meV in the metallic (3,3) tube. These large many-electron effects explain the discrepancies between previous theories and experiments.
- Research Organization:
- Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
- Sponsoring Organization:
- USDOE Director. Office of Science. Office of Basic Energy Sciences.Materials Sciences Division, Lawrence Livermore National Laboratory Contract W-7405-ENG-48; National Science Foundation Grant DMR0087088 (US)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 840883
- Report Number(s):
- LBNL--55068
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 7 Vol. 92; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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