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For the first time we present results of ab initio calculations of the structural and electronic properties of heterocrystalline combinations of a cubic (3 C) and a hexagonal ( pH, p0ex0ex=0ex0ex2,4,6) polytype of SiC, the material exhibiting the most pronounced polytypism. We show that these combinations give rise to a new type of ``heterostructures'' consisting of chemically identical but structurally different materials. For (3C)_N₁(pH)_N₂ superlattices we predict a similar behavior as found for type-II heterostructures.
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Bechstedt et al. (1995) studied this question.
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