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We discuss the significant implications of polytype superlattices and multi-heterostructures consisting of combinations of three semiconductors: AlSb, GaSb and InAs, which are compatible for heteroepitaxy. The triple-constituent multilayer heterostructures appear to offer not only a novel class of materials for scientific investigations but also a new breed of semiconductor devices for high-speed applications.
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Esaki et al. (1981) studied this question.
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