Engineering Physics Annotation << Back Can the superconductivity in the semiconductor and electron-ion plasma at cryogenic temperature? Rukhadze A.A. The possible formation of the superconducting state in a semiconductor or an electron-ion plasma with degenerate electrons (with negative charge carriers) due to the attraction of the electrons due to the exchange between the electrons by of ion-sound waves. Potentials obtained exchange interaction of two electrons at distances greater than the Debye length of the electrons, which correspond to attraction, and fall off with distance as 1/r3. We discuss the possibility of a bound state of two electrons («kupper pairs») in the field of such potential in the media. Key words: seiconductor, gaseous plasma, superconducnor, debay length/ ionsound, exchange interaction of electrons.. Contacts: E-mail: rukh@fpl.gpi.ru Pp. 45-48.