title: Bound excitons in metallic single-walled carbon nanotubes.
abstract: We extend previous ab initio calculations on excitonic effects in metallic single-walled carbon nanotubes to more experimentally realizable larger diameter tubes. Our calculations predict bound exciton states in both the (10,10) and (12,0) tubes with binding energies of approximately 50 meV providing experimentally verifiable changes to the absorption line shape in each case. The second and third van Hove singularities in the joint density of states also give rise to a single optically active bound or resonant excitonic state.
authors.affiliation: Department of Physics, University of California, Berkeley, Berkeley, California 94720, USA.
authors.forename: Jack
authors.initials: J
authors.lastname: Deslippe
authors.forename: Catalin D
authors.initials: CD
authors.lastname: Spataru
authors.forename: David
authors.initials: D
authors.lastname: Prendergast
authors.forename: Steven G
authors.initials: SG
authors.lastname: Louie
mesh_terms: D003198:Computer Simulation; D004735:Energy Transfer / Q000528:radiation effects; D008027:Light; D008956:Models, Chemical; D008958:Models, Molecular; D036103:Nanotechnology / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D011829:Radiation Dosage
chemical_list: D037742:Nanotubes, Carbon