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

Article

关键词: ZNSE/ZNMNSE QUANTUM STRUCTURES;    MAGNETIC-FIELD;    WELLS;    SUPERLATTICE;    ZN1-XMNXSE;    TRANSITION;    BEHAVIOR;    ENERGIES;   

DOI  :  10.1103/PhysRevB.54.7682

来源: SCIE

【 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.

【 授权许可】

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