Origin for the unusual photoluminescence behavior of GaP/AlP short-period superlattices in a strong magnetic field

✍ Scribed by Yoshinori Kobayashi; Kazuma Kouzu; Hiroshi Kamimura

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 324 KB
• Volume: 47
• Category: Article
• ISSN: 0167-9317
• DOI: 10.1016/s0167-9317(99)00220-8

✦ Synopsis

In GaP/AlP superlattices the observed photoluminescence (PL) intensity decreases with increasing a magnetic field applied along the superlattice direction in the strong field regime. The origin of this unusual behavior is discussed.

We show that a bound exciton localized around a defect at the interface is responsible for the unusual behavior. Based on this mechanism we have calculated the magnetic field dependence of the binding energy of a bound exciton and of the PL intensity by the variational method. It is shown that the calculated results are consistent with experimental results by Uchida et al.