Physics – Condensed Matter – Superconductivity
Scientific paper
2002-07-13
Physics
Condensed Matter
Superconductivity
7 pages REVTeX, 3 figures
Scientific paper
Highly transmissive ballistic junctions are demonstrated between Nb and the two-dimensional electron gas formed at an InAs/AlSb heterojunction. A reproducible fabrication protocol is presented yielding high critical supercurrent values. Current-voltage characteristics were measured down to 0.4 K and the observed supercurrent behavior was analyzed within a ballistic model in the clean limit. This investigation allows us to demonstrate an intrinsic interface transmissivity approaching 90%. The reproducibility of the fabrication protocol makes it of interest for the experimental study of InAs-based superconductor-semiconductor hybrid devices.
Beltram Fabio
Fazio Rosario
Giazotto Francesco
Grove-Rasmussen Kasper
Linfield Edmund H.
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