The model considered by Inkson and Anderson does not correspond to that suggested by Allender, Bray, and Bardeen to exhibit excitonic superconductivity at a metal-semiconductor interface. It is necessary for the semiconductor to have peaks in ε₂(→q,ω) at small ω for nearly all →q rather than only near →q=0.
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Allender et al. (1973) studied this question.
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