Randomness of the magnetic ion distribution in dilute magnetic semiconductor epilayers grown by molecular beam epitaxy

• Published in: Solid state communications 2000-01, Vol.113 (7), p.419-422
• Main Authors: Bednarski, H, Cisowski, J, Heimbrodt, W, Portal, J.C
• Format: Article
• Language: English
• Subjects: A. Semiconductors; B. Epitaxy; Condensed matter: electronic structure, electrical, magnetic, and optical properties; D. Optical properties; E. Light absorption and reflection; Electron states; Exact sciences and technology; Excitons and related phenomena; Intrinsic properties of excitons; optical absorption spectra; Magnetooptical effects; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of bulk materials and thin films; Physics
• ISSN: 0038-1098; 1879-2766
• DOI: 10.1016/S0038-1098(99)00500-1

We have applied our extended generalized pair approximation to dilute magnetic semiconductor epilayers grown by molecular beam epitaxy and in this paper we have compared our calculations of the heavy-hole exciton Zeeman splitting with those we measured on Zn 1− x Mn x Se and those measured by other authors on Cd 1− x Mn x Te epilayers. It appears that there can be found experimental results, including ours, which exhibit a systematic tendency to lie well below the corresponding theoretical curves based on random distribution. We can clearly attribute this reduced paramagnetic behavior to a non-random distribution of the magnetic ions and we present a way to determine the degree of non-random distribution.