Andreev reflection and enhanced subgap conductance in NbN/Au/InGaAs-InP junctions

I. E. Batov, Th. Schaepers, A. A. Golubov +1

We report on the fabrication of highly transparent superconductor/normal metal/two-dimensional electron gas junctions formed by a superconducting NbN electrode, a thin (10nm) Au in…