Faivre , T , Golubev , D & Pekola , J 2015 , ' Andreev current for low temperature thermometry ' Applied Physics Letters , vol 106 , no. 18 , 182602 , pp. 1-4 . DOI: 10.1063/1.4919892
Abstract:
We demonstrate experimentally that disorder enhanced Andreev current in a tunnel junction between a normal metal and a superconductor provides a method to measure electronic temperature, specifically at temperatures below 200 mK when aluminum is used. This Andreev thermometer has some advantages over conventional quasiparticle thermometers: For instance, it does not conduct heat and its reading does not saturate until at lower temperatures. Another merit is that the responsivity is constant over a wide temperature range.