Type-II interface exciton in ZnSe/(Zn,Mn)Se heterostructures

被引：5
作者：
Rossin, VV [1 ]
Bottger, T [1 ]
Henneberger, F [1 ]
机构：
[1] HUMBOLDT UNIV BERLIN,INST PHYS,D-10115 BERLIN,GERMANY
来源：
PHYSICAL REVIEW B | 1996年 / 54卷 / 11期
关键词：
D O I：
10.1103/PhysRevB.54.7682
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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 lifelines 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.
引用
收藏
页码：7682 / 7685
页数：4
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