Calorimetric readout of a superconducting proximity-effect thermometer

Details Calorimetric readout of a superconducting proximity-effect thermometer Calorimetric readout of a superconducting proximity-effect thermometer

2009-01-08

arxiv.org/abs/0901.1013v1

J. Low Temp. Phys. 154, 190 (2009)

Physics

Condensed Matter

Superconductivity

10 pages, 5 figures. To appear in the proceedings of the Conference on Micro- and Nanocryogenics (LT25 satellite) organized in

Scientific paper

10.1007/s10909-008-9854-y

A proximity-effect thermometer measures the temperature dependent critical supercurrent in a long superconductor - normal metal - superconductor (SNS) Josephson junction. Typically, the transition from the superconducting to the normal state is detected by monitoring the appearance of a voltage across the junction. We describe a new approach to detect the transition based on the temperature increase in the resistive state due to Joule heating. Our method increases the sensitivity and is especially applicable for temperatures below about 300 mK.

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