Microscopic interface phonon modes in structures of GaAs quantum dots embedded in AlAs shells

Details Microscopic interface phonon modes in structures of GaAs quantum dots embedded in AlAs shells Microscopic interface phonon modes in structures of GaAs quantum dots embedded in AlAs shells

2001-06-21

arxiv.org/abs/cond-mat/0106436v1

Physics

Condensed Matter

Materials Science

13 pages, 4 figures

Scientific paper

10.1016/S0038-1098(01)00483-5

By means of a microscopic valence force field model, a series of novel microscopic interface phonon modes are identified in shell quantum dots(SQDs) composed of a GaAs quantum dot of nanoscale embedded in an AlAs shell of a few atomic layers in thickness. In SQDs with such thin shells, the basic principle of the continuum dielectric model and the macroscopic dielectric function are not valid any more. The frequencies of these microscopic interface modes lie inside the gap between the bulk GaAs band and the bulk AlAs band, contrary to the macroscopic interface phonon modes. The average vibrational energies and amplitudes of each atomic shell show peaks at the interface between GaAs and AlAs. These peaks decay fast as their penetrating depths from the interface increase.

Affiliated with

Also associated with

No associations

Rating

Microscopic interface phonon modes in structures of GaAs quantum dots embedded in AlAs shells 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 Microscopic interface phonon modes in structures of GaAs quantum dots embedded in AlAs shells, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microscopic interface phonon modes in structures of GaAs quantum dots embedded in AlAs shells will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-42176