Excitonic effects and optical spectra of single-walled carbon nanotubes

Journal Article · Tue Jul 15 00:00:00 EDT 2003 · Physical Review Letters

OSTI ID:840883

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

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: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• 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; PRLTAO; R&D Project: 506701; TRN: US200512%%305
• Journal Information: Physical Review Letters, Vol. 92, Issue 7; Other Information: Journal Publication Date: 02/20/2004; PBD: 15 Jul 2003; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON
EXCITONS
NANOTUBES
SPECTRA