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VOLUME 49 (1989) | ISSUE 5 | PAGE 293
Point-contact measurements of the energy gap of lead-chalcogenide-based superconducting superlattices
The energy gap of superconducting PbTe-PbS semiconductor superlattices has been analyzed with the help of point contacts for the first time below the critical temperature, Tc = 3.9 K, and in the fluctuation region T> Tc. The size of the gap and its dependence on the temperature and field are determined by the position of the point contact inside the superlattice.