ZNS ZNSE SUPERLATTICES UNDER PRESSURE

Self-consistent linear muffin-tin orbital method is used to calculate the band structure of ZnS/ZnSe (001) strained-layer superlattice and i nvestigate the influence of hydrostatic pressure on the valence band o ffset (VBO). Three different strain modes corresponding to various val ues of the relative thicknesses of both materials are considered. A I --> II type conversion associated with the conduction-band crossover b etween the ZnSe well and ZnS barrier layers is found in agreement with recent experimental data.