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Superconductor-semiconductor-superconductor weak links with a normal layer of InSb thin film were fabricated. A large normal resistance of 16 Ω and a critical supercurrent of 50 µA were obtained at 4.2 K for a channel length of 0.19 µm between Nb electrodes. The normal resistance of 16 Ω is about 40 times as large as that of a junction with the normal layer of a Si bulk crystal.
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Hato et al. (1991) studied this question.
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