Journal of Low Temperature Physics

, Volume 37, Issue 3, pp 343–365

Acoustic matching of superconducting films to substrates

  • Steven B. Kaplan

DOI: 10.1007/BF00119193

Cite this article as:
Kaplan, S.B. J Low Temp Phys (1979) 37: 343. doi:10.1007/BF00119193


Acoustic mismatch theory is used to estimate phonon transmission coefficients for various superconductor/substrate interfaces. It is shown that the conventionally employed substrates offer the largest acoustic mismatch to many of the commonly studied superconductors, thereby leading to unnecessarily large phonon-trapping and other nonequilibrium effects. Most available experimental results are shown to be in reasonable agreement with the theoretical estimates.

Copyright information

© Plenum Publishing Corporation 1979

Authors and Affiliations

  • Steven B. Kaplan
    • 1
  1. 1.Electromagnetic Technology DivisionNational Bureau of StandardsBoulder