Andreev current for low temperature thermometry

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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.
Original languageEnglish
Article number182602
Pages (from-to)1-4
Number of pages4
JournalApplied Physics Letters
Volume106
Issue number18
DOIs
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed

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