Projects per year
Abstract
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.
Original language | English |
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Article number | 054001 |
Number of pages | 7 |
Journal | Physical Review Applied |
Volume | 13 |
Issue number | 5 |
DOIs | |
Publication status | Published - 1 May 2020 |
MoE publication type | A1 Journal article-refereed |
Keywords
- TRANSPORT
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Dive into the research topics of 'Optimized Proximity Thermometer for Ultrasensitive Detection'. Together they form a unique fingerprint.Datasets
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Optimized Proximity Thermometer for Ultrasensitive Detection
Karimi, B. (Creator), Nikolic´, D. (Creator), Tuukkanen, T. (Creator), Peltonen, J. (Creator), Belzig, W. (Creator) & Pekola, J. (Creator), Zenodo, 2020
DOI: 10.1103/PhysRevApplied.13.054001, https://zenodo.org/record/5786460
Dataset
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QTF: Finnish Centre of Excellence in Quantum Technology
Pekola, J., Blanchet, F., Golubev, D., Maillet, O., Marín Suárez, M., Mannila, E. & Senior, J.
01/01/2018 → 31/12/2020
Project: Academy of Finland: Other research funding
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QuESTech: QUantum Electronics Science and TECHnology training
Pekola, J., Karimi, B. & Peltonen, J.
01/01/2018 → 31/12/2021
Project: EU: Framework programmes funding