Physics
Scientific paper
Aug 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011njph...13h3028k&link_type=abstract
New Journal of Physics, Volume 13, Issue 8, pp. 083028 (2011).
Physics
Scientific paper
Excitons comprising electron-hole pairs are one of the representative many-body effects in carbon nanotubes (CNTs) and are well known to affect the optical properties of CNTs. In addition to the excitons, another fascinating many-body effect in CNTs is magnetism that is inherent in CNTs with certain imperfections, such as adsorbents, defects and interfaces, in their hexagonal atomic network. In this paper, we report on the interesting interplay between these two many-body effects in CNTs: the localized spins originating from imperfections in CNTs can couple to the excitons and change the spin state of excitons. We show that the interaction can be written as the spin-spin interaction expressed by the Kondo-like Hamiltonian. Our calculation reveals that the interaction induces mixing between the singlet and triplet excitons and that this mixing produces optically activated triplet excitons. The results solve a recent mystery regarding the microscopic origin of unexpected behavior in the photoluminescence spectra of CNTs.
Konabe Satoru
Okada Susumu
No associations
LandOfFree
Effects of localized spins on excitons in single-walled carbon nanotubes with imperfections does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Effects of localized spins on excitons in single-walled carbon nanotubes with imperfections, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effects of localized spins on excitons in single-walled carbon nanotubes with imperfections will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1664425