Magnetic Field-Induced Type-I Type-II Transition in (ZuMu)Se/(ZaBe)Se Spin Superlattices
RUSSIAN ACADEMY OF SCIENCES SAINT PETERSBURG IOFFE PHYSICAL-TECHNICAL INST
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We have performed a magnetooptical study on spin superlattice structures fabricated on the basis of ZnMnSeZnBeSe. The band alignment of a Zn0.91Mn0.09Se Zn0.972Be0.028Se superlattice was found to undergo a type-I to type-Il transition for one of the exciton spin component. This spin superlattice formation manifests itself in an asymmetric Zeeman splitting of a spatially direct exciton resulting from a spin dependent change of the exciton binding energy. A pronounced broadening of the spatially direct exciton in reflectance and photoluminescence excitation spectra was observed when scattering in the ZnBeSe barriers becomes possible.
- Atomic and Molecular Physics and Spectroscopy