Voltage-current characteristics of a regular system of weakly coupled superconducting particles

The voltage-current characteristic of a regular system of identical, weakly coupled superconducting particles has been studied for a sample covered by a metal film. Near T/sub c/, an inverse hysteresis is found, i.e., the current corresponding to the return to the superconducting state is higher than the critical current for the disruption of superconductivity. When samples with clean surfaces are used as both source and detector, they influence each other; i.e., there is a stimulation of superconductivity