Electron cooling by diffusive normal metal–superconductor tunnel junctions
Electron cooling by diffusive normal metal–superconductor tunnel junctions
We investigate heat and charge transport in ${\text{NN}}^{\ensuremath{'}}\text{IS}$ tunnel junctions in the diffusive limit. Here, N and S are massive normal and superconducting electrodes (reservoirs), ${\text{N}}^{\ensuremath{'}}$ is a normal metal strip, and I is an insulator. The flow of electric current in such structures at subgap bias is accompanied by …