Temperature Dependence of the Heat Escape Time Deduced From the Nucleation of a Dissipative Zone in Superconducting YBa2Cu3O7 Filament

K. Harrabi

doi:10.1109/TASC.2016.2524451

Temperature Dependence of the Heat Escape Time Deduced From the Nucleation of a Dissipative Zone in Superconducting YBa₂Cu₃O₇ Filament

K. Harrabi^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

The application of an overcritical current pulse I > I_c(T) to narrow YBa₂Cu₃O₇ strips generates a phase-slip center after a certain delay time t_d. By analyzing this function t_d(I/I_c) through a time-dependent Ginzburg-Landau theory, one can extract the time of heat escape τ_esc from the film to the substrate. The parameter τ_esc was found to remain constant in the range from 5 to 40 K, but to increase notably above 40 K and up to T_c. We interpret this behavior as a manifestation of a Kapitza heat transfer by acoustic phonon radiation. The loss of transmissivity at higher temperatures is likely related to the rise of phonon-phonon decay processes.

Original language	English
Article number	7397940
Journal	IEEE Transactions on Applied Superconductivity
Volume	26
Issue number	3
DOIs	https://doi.org/10.1109/TASC.2016.2524451
State	Published - Apr 2016

Bibliographical note

Publisher Copyright:
© 2016 IEEE.

Keywords

Superconducting thin film
critical current density
heat transfer

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1109/TASC.2016.2524451

Cite this

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abstract = "The application of an overcritical current pulse I > Ic(T) to narrow YBa2Cu3O7 strips generates a phase-slip center after a certain delay time td. By analyzing this function td(I/Ic) through a time-dependent Ginzburg-Landau theory, one can extract the time of heat escape τesc from the film to the substrate. The parameter τesc was found to remain constant in the range from 5 to 40 K, but to increase notably above 40 K and up to Tc. We interpret this behavior as a manifestation of a Kapitza heat transfer by acoustic phonon radiation. The loss of transmissivity at higher temperatures is likely related to the rise of phonon-phonon decay processes.",

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AB - The application of an overcritical current pulse I > Ic(T) to narrow YBa2Cu3O7 strips generates a phase-slip center after a certain delay time td. By analyzing this function td(I/Ic) through a time-dependent Ginzburg-Landau theory, one can extract the time of heat escape τesc from the film to the substrate. The parameter τesc was found to remain constant in the range from 5 to 40 K, but to increase notably above 40 K and up to Tc. We interpret this behavior as a manifestation of a Kapitza heat transfer by acoustic phonon radiation. The loss of transmissivity at higher temperatures is likely related to the rise of phonon-phonon decay processes.

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