Projects per year
We present a set of experiments to optimize the performance of a noninvasive thermometer based on proximity superconductivity. Current through a standard tunnel junction between an aluminum superconductor and a copper electrode is controlled by the strength of the proximity induced to this normal metal, which in turn is determined by the position of a direct superconducting contact from the tunnel junction. Several devices with different distances are tested. We develop a theoretical model based on Usadel equations and dynamic Coulomb blockade that reproduces the measured results and yields a tool to calibrate the thermometer and to optimize it further in future experiments. We also propose an analytic formula that reproduces the experimental data for a wide range of temperatures.
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Gubaydullin, A., Peltonen, J., Pekola, J., Marin Suarez, M., Blanchet, F., Chang, Y., Mannila, E., Lvov, D., Karimi, B., Mäkinen, I., Singh, S., Senior, J., Wang, L., Subero Rengel, D., Thomas, G. & Upadhyay, R.
27/09/2017 → 30/09/2023
Project: EU: ERC grants
01/01/2018 → 31/12/2021
Project: EU: Framework programmes funding