Bound excitons in metallic single-walled carbon nanotubes.
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.
Deslippe
Jack
J
Department of Physics, University of California, Berkeley, Berkeley, California 94720, USA.
Spataru
Catalin D
CD
Prendergast
David
D
Louie
Steven G
SG
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
D037742:Nanotubes, Carbon