THEORY OF THE INTERFACE EXCITON IN A STRONG MAGNETIC-FIELD

A simple theoretical model for the interface exciton in a strong magnetic field is developed. We propose that in the case of a strong magnetic field, a bound state for the interface exciton exists for fields greater than some critical value B0. It is shown that contrary to the case with no field, the interface exciton in a strong magnetic field is localized near the junction plane and can have a large binding energy. Using the developed model, we made a theoretical study of the explanation by Clark et al. of the nature of the B peak observed in their recent photoluminescence experiment [Clark et al., Physica B 201, 301 (1994)], and we obtained good agreement with their results. © 1995 The American Physical Society.