Heterojunctions of n-type InAs0.95Sb0.05 grown by metalorganic chemical vapor deposition on n-type GaSb substrates were studied by capacitance-voltage and current-voltage measurements. The n-n heterojunctions are strongly rectifying and behave like metal-(n) GaSb Schottky diodes with a barrier height of 0.80±0.02 eV. These measurements establish that the band lineup in this system is of the broken gap variety. We measure the valence-band offset, Ev(GaSb)−Ev(InAs0.95Sb0.05), to be 0.67±0.04 eV.
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Srivastava et al. (1986) studied this question.
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