Abstract
Photoluminescence as a function of temperature and magnetic field from single walled carbon nanotube solutions is described. This is modelled assuming that it is dominated by the small energy splitting between the dark and bright states of the singlet excitons which are found to be in the region of 1-5 meV for nanotubes of 0.8-1.2nm. The emission energies show a large red-shift due to the introduction of an Aharanov-Bohm phase by magnetic field along the tube axis and the luminescence intensity is strongly enhanced at low temperatures due to the mixing of the different valley states of the excitons.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1180-1188 |
| Number of pages | 9 |
| Journal | International Journal of Modern Physics B |
| Volume | 21 |
| Issue number | 8-9 |
| State | Published - Apr 10 2007 |
| Externally published | Yes |
Keywords
- Carbon nanotubes
- Excitons
- Photoluminescence
- PLE
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
- Statistical and Nonlinear Physics
- Mathematical Physics