Abstract
Two emission bands are observed in the photoluminescence spectrum of ZnSe/(Zn,Mn)Se heterostructures. These bands emerge in a magnetic field and are associated with interface excitons formed as a result of a magnetic-field-induced type-I–type-II transition of the band alignment. Time-resolved measurements yield lifetimes in the ns range signifying a relatively large spatial separation of electrons and holes and hence low optical oscillator strength. These features are confirmed by a theoretical analysis of the interface exciton state revealing a reduced importance of the electron-hole Coulomb interaction in comparison with type-II excitons in quantum wells. © 1996 The American Physical Society.
- Received 2 May 1996
DOI:https://doi.org/10.1103/PhysRevB.54.7682
©1996 American Physical Society
