Thin-Film Thermal Conductivity Measurements Using Superconducting Nanowires

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 sw...

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Bibliographic Details
Published inJournal of low temperature physics Vol. 193; no. 3-4; pp. 380 - 386
Main Authors Allmaras, J. P., Kozorezov, A. G., Beyer, A. D., Marsili, F., Briggs, R. M., Shaw, M. D.
Format Journal Article
LanguageEnglish
Published New York Springer US 01.11.2018
Springer Nature B.V
Subjects
CALIBRATION
Characterization and Evaluation of Materials
Condensed Matter Physics
COOLING TIME
HEAT
HEAT TRANSFER
HEATERS
Low temperature physics
Magnetic Materials
Magnetism
NANOSCIENCE AND NANOTECHNOLOGY
NANOWIRES
PHOTONS
Physics
Physics and Astronomy
SIMULATION
Substrates
Superconductivity
SUPERCONDUCTORS
Switching
THERMAL CONDUCTIVITY
THIN FILMS
Transport properties
Superconductor
Nanowire
Thermometry
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Summary: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.
ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-018-2022-0