Fine-structure splitting of exciton states in quantum dot molecules: symmetry and tunnel-coupling effects

Details Fine-structure splitting of exciton states in quantum dot molecules: symmetry and tunnel-coupling effects Fine-structure splitting of exciton states in quantum dot molecules: symmetry and tunnel-coupling effects

2007-05-26

arxiv.org/abs/0705.3880v3

J. Phys.: Condens. Matter 20, 045204 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 8 figures

Scientific paper

Exciton levels and fine-structure splitting in laterally-coupled quantum dot molecules are studied. The electron and hole tunneling energies as well as the direct Coulomb interaction are essential for the exciton levels. It is found that fine-structure splitting of the two-lowest exciton levels is contributed from the intra- and inter-dot exchange interactions, both of which are largely influenced by the symmetry and tunnel-coupling between the two dots. As the inter-dot separation is reduced, fine-structure splitting of the exciton ground state is largely increased while those of the excited states are decreased. Moreover, the dependence of the fine-structure splitting in quantum dot molecules on the Coulomb correlation is clearly clarified.

Affiliated with

Also associated with

No associations

Rating

Fine-structure splitting of exciton states in quantum dot molecules: symmetry and tunnel-coupling effects 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 Fine-structure splitting of exciton states in quantum dot molecules: symmetry and tunnel-coupling effects, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fine-structure splitting of exciton states in quantum dot molecules: symmetry and tunnel-coupling effects will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-582344