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The effect of variation in the band offset on the band gap and optical properties of the HgTe-CdTe superlattice is examined. If we define the valence-band offset ΔEν to be the energy of the valence-band edge of the HgTe with respect to the valence-band edge of the CdTe, both the band gap and optical properties are smooth functions about ΔEν≊0.
Wu et al. (1985) studied this question.