Josephson devices coupled by semiconductor links

A review of the field of semiconductor-barrier Josephson junctions is presented. In recent years, several materials which had not previously been used as Josephson barriers have been investigated. The use of both single-crystal and novel amorphous materials has confirmed that relatively thick semiconductor barriers can support large Josephson current densities. Although the fabrication technology of these and older semiconductor-barrier devices is not as advanced as that of some oxide barriers, both digital and sensor applications of semiconductor barriers have been described. Advantages and problems of these devices in practical applications are discussed.