High critical-current superconductor-InAs nanowire-superconductor junctions.
basic_science · Level V
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- Record sourced from PubMed, PMID 23030250.
- Also identified by DOI 10.1021/nl302740f.
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Abstract
We report on the fabrication of InAs nanowires coupled to superconducting leads with high critical current and widely tunable conductance. We implemented a double lift-off nanofabrication method to get very short nanowire devices with Ohmic contacts. We observe very high critical currents of up to 800 nA in a wire with a diameter of 80 nm. The current-voltage characteristics of longer and suspended nanowires display either Coulomb blockade or supercurrent depending on a local gate voltage, combining different regimes of transport in a single device.