Strain effects in HgTehyphen;CdTe superlattices grown on CdTe substrates

摘要

The effects of strain on the band structure, the band gap, and optical properties of the superlattice grown on CdTe substrates are discussed. The presence of strain modifies the band gap and optical properties of the HgTehyphen;CdTe superlattice in a minor way. However, strain does change the band structure as compared to that in the unstrained superlattice. For wave vectors perpendicular to the layers, the top of the valence band is more lighthyphen;holehyphen;like in constrast to the unstrained case where the top of the valence band is more heavyhyphen;holehyphen;like. For wave vectors parallel to the layers, the bands remain unchanged.