liu.seSearch for publications in DiVA
Change search
ReferencesLink to record
Permanent link

Direct link
Photoluminescence study of AlAs/GaAs superlattices containing enlarged wells
Faculty of Physics, Sofia Univ., 5 Blvd. James B., Sofia, Bulgaria.
Faculty of Physics, Sofia Univ., 5 Blvd. James B., Sofia, Bulgaria.
Faculty of Physics, Sofia Univ., 5 Blvd. James B., Sofia, Bulgaria.
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Materials Science .
Show others and affiliations
2000 (English)In: Thin Solid Films, ISSN 0040-6090, Vol. 364, no 1, 224-227 p.Article in journal (Refereed) Published
Abstract [en]

Photoluminescence (PL) spectra of MBE grown short-period AlAs/GaAs superlattices with one or two enlarged wells (5 and 12 nm) have been measured at 2 K. Sharp PL peaks corresponding to excitonic transitions between the lowest electron and heavy-hole states in the enlarged wells are observed. The excitonic transition energies are calculated by means of an envelope function based model, taking into account the exciton binding energies. The model incorporates a smooth potential at the interfaces, which is represented by a diffusion potential, the diffusion length being a parameter. The calculated and experimentally observed excitonic transition energies agree well if diffusion lengths of 3.5 and 4.5 monolayers are considered in the samples with and without a buffer layer, respectively. These values are consistent with the complicated nature of the growth kinetics and mechanisms of quantum heterostructures. The PL spectra reveal also complicated structures connected with the superlattice. Their qualitative discussion confirms the smooth potential model. Thus, an attempt is made to extend the analysis of complicated AlAs/GaAs heterostructures towards real interfaces, which is essential for advanced device fabrication.

Place, publisher, year, edition, pages
2000. Vol. 364, no 1, 224-227 p.
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-47675DOI: 10.1016/S0040-6090(99)00943-8OAI: diva2:268571
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2011-01-14

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Ivanov, Ivan Gueorguiev
By organisation
The Institute of TechnologyMaterials Science
In the same journal
Thin Solid Films
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 24 hits
ReferencesLink to record
Permanent link

Direct link