2008/04/08 by Vasili Perebeinos, Phaedon Avouris · 1 citation
Chemistry · Materials Science · Physics and Astronomy · #Atomic physics #Biexciton #Carbon Nanotubes in Composites #Carbon nanotube #Condensed matter physics #Doping #Electron #Excited state #Exciton #Fullerene Chemistry and Applications #Materials science #Mechanical and Optical Resonators #Molecular physics #Nanotechnology #Nuclear physics #Optoelectronics #Phonon #Physics #Range (aeronautics) #Semiconductor #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.101.057401
published as Phys. Rev. Lett. 101, 057401 (2008). · 4 pages, 3 figures, + 7 pages, 3 figures in attached appendix
arxiv created 2008/04/08 · openalex publication_date 2008/07/30 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate theoretically the rates of nonradiative decay of excited semiconducting nanotubes by a variety of decay mechanisms and compare them with experimental findings. We find that the multiphonon decay (MPD) of free excitons is too slow to be responsible for the experimentally observed lifetimes. However, MPD lifetimes of localized excitons could be 2-3 orders of magnitude shorter. We also propose a new decay mechanism that relies on a finite doping of nanotubes and involves exciton decay into an optical phonon and an intraband electron-hole pair. The resulting lifetime is in the range of 5 to 100 ps, even for a moderate doping level.