EXPERIMENTAL EVIDENCE OF N-S STATE OF NON-EQUILIBRIUM SUPERCONDUCTOR
非平衡超导体N-S分区的实验证明

Superconducting lead film is driven into the non-equilibrium state by tunnel injection of quasi-particles. There are two kinds of zero resistance state under the same injection level, depending upon the sample history. With the help of double tunnel injection, we found one of them is in the homogeneous non-equilibrium superconducting state and the other in the N-S inhomogeneous one.