Spin-flip Raman scattering (SFRS) has been applied to the investigation of a range of wide band-gap II-VI heterostructures. In the ternary alloys ZnSxSe1-x and Zn1-xMgxSe, we have studied the dependence of the conduction band gyromagnetic ratio on composition and find that the data are described well by the predictions of five-band k · p theory: we have made similar predictions for the alloy system Zn1-xCdxSe. In the latter system, the fractional monolayer (FM) deposition of CdSe on ZnSe has made possible the formation of an inhomogeneous Zn1-xCdxSe alloy layer. We have studied SFRS in one such structure in resonance with excitons localized at the CdSe FM and have obtained a value for the electron gyromagnetic ratio which is equal to that of bulk ZnSe. We also obtain an estimate of a zero-field electron-hole exchange splitting of the exciton states of 0.68 meV which is 2.8 (5.2) times larger than that observed for bulk ZnSe (CdSe).
|Number of pages||6|
|Journal||Physica Status Solidi (B) Basic Research|
|Publication status||Published - Sept 1999|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics