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n-n Ga0.7Al0.3As: GaAs heterojunction structures have been grown by l.p.e., with 1 × 1015 cm-3 net carriers in the ternary. N/W profiling across the heterojunction shows an accumulation region on the GaAs side and a depletion region on the (Ga, Al)As side. I/V characteristics at room temperature show significant rectification.
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Chandra et al. (1979) studied this question.
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