Curvature of band overlap in InAs/GaSb Type II superlattices

Tight binding calculations of the band alignment in InAs/GaSb type II broken-gap superlattices have been carried out with a valence band offset value of 0.57 eV obtained at root temperature 300 K, in good agreement with experiments. The valence band offset decreases with temperature, whereas the band overlap exhibits curvature with minimum at 550 K. It is inferred that there is no possibility of band alignment transition due to temperature.