Novel superconducting superlattices with transition temperature in the range 2.5–6.4 K consisting only of semiconducting materials are discovered. Among them there are multilayers, including a wide-gap semiconductor as one of the components. It is shown that superconductivity is connected with the interfaces between two semiconductors containing regular grids of the misfit dislocations. The possibility of the dislocation-induced superconductivity is discussed.

• Received 26 January 1999

DOI:https://doi.org/10.1103/PhysRevLett.86.512