Observation of type-I excitons and related confinement effects in type-II superlattices

F. C. Zhang, H. Luo, N. Dai, N. Samarth, M. Dobrowolska, J. K. Furdyna

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

CdSe/Zn1-xMnxTe superlattices are characterized by type-II band alignment. We have used these structures to demonstrate that type-II superlattices can exhibit type-I excitons, i.e., excitons which are confined in the same semiconductor layer (either in CdSe or in Zn1-xMnxTe in the present example). Such spatially direct excitons form in a type-II structure when one of the carriers (electron or hole) originates from a well, while the other (hole or electron) originates from a state localized in the barrier, which is typical for subbands at above-barrier energies.

Original languageEnglish (US)
Pages (from-to)3806-3810
Number of pages5
JournalPhysical Review B
Volume47
Issue number7
DOIs
StatePublished - 1993

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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