Abstract
The band structures of HgTe, CdTe, ZnTe, the alloys Hg1-xCdxTe (HCT) and Hg1-xZnxTe (HZT) and several small-gap superlattices (SL) are calculated using a tight-binding model. The authors calculations show a nearly linear dependence of the energy gap on the concentration in HCT, but a strong non-linear variation in HZT. The electron mass as a function of the band gap is found to be the same in HCT and HZT in the small-gap region. Their calculated SL bands, in fair agreement with the most recent experiments and theories, support the assumption of a large valence band offset (350 meV) between HgTe and CdTe.
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