Journal of Low Temperature Physics

, Volume 193, Issue 3–4, pp 380–386 | Cite as

Thin-Film Thermal Conductivity Measurements Using Superconducting Nanowires

  • J. P. AllmarasEmail author
  • A. G. Kozorezov
  • A. D. Beyer
  • F. Marsili
  • R. M. Briggs
  • M. D. Shaw


We present a simple experimental scheme for estimating the cryogenic thermal transport properties of thin films using superconducting nanowires. In a parallel array of nanowires, the heat from one nanowire in the normal state changes the local temperature around adjacent nanowires, reducing their switching current. Calibration of this change in switching current as a function of bath temperature provides an estimate of the temperature as a function of displacement from the heater. This provides a method of determining the contribution of substrate heat transport to the cooling time of superconducting nanowire single-photon detectors. Understanding this process is necessary for successful electrothermal modeling of superconducting nanowire systems.


Thermometry Superconductor Nanowire 



This work was supported by a NASA Space Technology Research Fellowship (Grant No. NNX16AM54H). AGK, FM, and MDS acknowledge financial support from DARPA. This work was carried out at the Jet Propulsion Laboratory under contract with the National Aeronautics and Space Administration.


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Copyright information

© This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply  2018

Authors and Affiliations

  1. 1.Department of Applied Physics and Materials ScienceCalifornia Institute of TechnologyPasadenaUSA
  2. 2.Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadenaUSA
  3. 3.Department of PhysicsLancaster UniversityLancasterUK

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