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Title: Andreev current for low temperature thermometry

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.
Authors:
;  [1] ;  [1] ;  [2]
  1. Low Temperature Laboratory, Department of Applied Physics, Aalto University School of Science, P.O. Box 13500, FI-00076 Aalto (Finland)
  2. (KIT), Institute of Nanotechnology, 76021 Karlsruhe (Germany)
Publication Date:
OSTI Identifier:
22399008
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 18; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINIUM; ELECTRIC CURRENTS; HEAT TRANSFER; SUPERCONDUCTING JUNCTIONS; SUPERCONDUCTORS; TEMPERATURE RANGE 0000-0013 K; THERMOMETERS; TUNNEL EFFECT