Abstract
Highly transmissive ballistic junctions are demonstrated between two superconducting Nb electrodes and the two-dimensional electron gas formed at an InAs/AISb heterojunction. A reproducible fabrication protocol is presented yielding good 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 exceeding 86%.
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Giazotto, F., Grove-Rasmussen, K., Fazio, R. et al. Josephson Current in Nb/InAs/Nb Highly Transmissive Ballistic Junctions. Journal of Superconductivity 17, 317–321 (2004). https://doi.org/10.1023/B:JOSC.0000021231.01260.94
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DOI: https://doi.org/10.1023/B:JOSC.0000021231.01260.94