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

Direct link
Magneto-optical study on exciton screening in p-type AlxGa1-xAs/InyGa1-yAs quantum wells
Linköping University, Department of Physics, Chemistry and Biology, Chemical and Optical Sensor Systems. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-7104-7127
CATHOLIC UNIV NIJMEGEN,NETHERLANDS.
CATHOLIC UNIV NIJMEGEN,NETHERLANDS.
CATHOLIC UNIV NIJMEGEN,NETHERLANDS.
Show others and affiliations
1997 (English)In: Physical Review B Condensed Matter, ISSN 0163-1829, E-ISSN 1095-3795, Vol. 56, no 8, 4853-4862 p.Article in journal (Refereed) Published
Abstract [en]

We have studied exciton unbinding in empty and p-doped quantum wells, using magnetophotoluminescence excitation measurements. The use of p-type quantum wells allows us to discriminate unambiguously between exciton bleaching by Coulomb screening and by the Pauli exclusion principle. We found that the ground-state heavy-hole exciton, which experiences both effects, is unbound at hole densities in the range (6-9) x 10(15) m(-2). In contrast, the ground-state light-hole and first excited heavy-hole excitons, which are only screened by the Coulomb interaction, still have a finite binding energy at these densities. However, for both bands, its Value is far below what is found in an undoped well. Furthermore, we found a strong indication that, in p-doped wells, the excitons of excited subbands are less efficiently screened than those of the Light-hole ground state, due to the lesser overlap of the screening ground-state heavy holes with the excited subbands than with the ground-state light holes.

Place, publisher, year, edition, pages
American Physical Society , 1997. Vol. 56, no 8, 4853-4862 p.
National Category
Theoretical Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-116066DOI: 10.1103/PhysRevB.56.4853ISI: A1997XV00700086OAI: oai:DiVA.org:liu-116066DiVA: diva2:813298
Available from: 2015-05-22 Created: 2015-03-24 Last updated: 2015-05-29

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Kemerink, Martijn
By organisation
Chemical and Optical Sensor SystemsThe Institute of Technology
In the same journal
Physical Review B Condensed Matter
Theoretical Chemistry

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: 36 hits
ReferencesLink to record
Permanent link

Direct link