Photoluminescence Spectra of (GaAs)12(AlAs)12 Superlattice under High Pressure
1989 年 58 巻 7 号 p. 2242-2243
詳細
1989 年 58 巻 7 号 p. 2242-2243
Photoluminescence spectra of MBE-grown (GaAs)12(AlAs)12 superlattices under high pressure and low temperature are measured. Two main emission bands are observed. The higher emission band behaves like a Γ-edge under pressure; the lower emission band, on the other hand, behaves like an X-edge. This result shows that the Γ−X crossover occurs beyond the twelfth layers in (GaAs)m(AlAs)m superlattices.
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