Final Report for Contract N00014-81-K-0430 (Illinois University)
Abstract
Semiconductor superlattices have drawn substantial interest in the last decade. In an effort to understand the electronic structures, we have developed some new computational methods, including the multi-band effective-mass method, the Wannier-orbital method and the bond-orbital method. We have developed a new line-shape theory for photoabsorption in superlattices. The new method allows one to accurately and efficiently calculate the photo-absorption of a realistic superlattice, including excitonic effect, valence band mixing and inter-well-coupling. We have performed detailed theoretical studies of phonon modes in semiconductor superlattices in an realistic rigid-ion model. We have calculated the dispersion curves for phonons propagating in any directions, taking into account the long-range Coulomb interactions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 30, 1988
- Accession Number
- ADA255951
Entities
People
- A. Cancio
- I. Perakis
- S.-f. Ren
- Yia-Chung Chang
Organizations
- University of Illinois Urbana–Champaign