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Electronic and optical properties of InAs/InAs<sub>0.625</sub>Sb<sub>0.375</sub> superlattices and their application for far-infrared detectors
We calculate the electronic and optical properties of InAs/InAs$_{0.625}$Sb$_{0.375}$ superlattices within relativistic density functional theory. To have a good description of the electronic and optical properties, the modified Becke-Johnson exchange-correlation functional is pondered to correctly approximate the band gap. First, we analyze electronic and optical characteristics of bulk InAs and …