{\it Ab--initio} finite temperature excitons

Details {\it Ab--initio} finite temperature excitons {\it Ab--initio} finite temperature excitons

2007-12-20

arxiv.org/abs/0712.3365v4

Physics

Condensed Matter

Materials Science

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.101.106405

The coupling with the lattice vibrations is shown to drastically modify the state--of--the--art picture of the excitonic states based on a frozen atom approximation. The zero--point vibrations renormalize the bare energies and optical strengths. Excitons acquire a non--radiative lifetime that decreases with increasing temperature. The optical brightness and efficiency turn out to be strongly temperature dependent such as to induce bright to dark (and vice versa) transitions. The finite temperature experimental optical absorption spectra of bulk Si and hexagonal BN are successfully explained without using any external parameter.

Affiliated with

Also associated with

No associations

Rating

{\it Ab--initio} finite temperature excitons 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 {\it Ab--initio} finite temperature excitons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and {\it Ab--initio} finite temperature excitons will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-2830