Journal of Low Temperature Physics

, Volume 37, Issue 3–4, pp 343–365 | Cite as

Acoustic matching of superconducting films to substrates

  • Steven B. Kaplan
Article

Abstract

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.

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Copyright information

© Plenum Publishing Corporation 1979

Authors and Affiliations

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

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