Anisotropic Zeeman splitting in semimagnetic quantum-well structures

Abstract

The Zeeman splitting pattern in semimagnetic superlattices and asymmetric double quantum wells composed of different sequences of semimagnetic and nonmagnetic well and barrier materials have been investigated experimentally and theoretically, in particular, in dependence on the orientation of an external magnetic field and the lattice mismatch induced biaxial strain. The magneto-optical anisotropy, which appears by varying the tilting angle of the magnetic field, can be explained by coupling of heavy- and light-hole states of the ${\ensuremath{\Gamma}}_{8}$ valence band. Theoretical results have been obtained by transfer matrix method and are compared with experimental photoluminescence and photoluminescence excitation spectra obtained on superlattices and asymmetric double quantum wells.