Subgap noise of a superconductor–normal-metal tunnel interface
Subgap noise of a superconductor–normal-metal tunnel interface
It is well established that the subgap conductivity through a normal-metal-insulator--superconductor (NIS) tunnel junction is strongly affected by interference of electron waves scattered by impurities. In this paper we investigate how the same phenomenon affects the low frequency current noise, $S$, for voltages $V$ and temperatures $T$ much smaller than …