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Slow electron-phonon cooling in superconducting diamond films

Titova, Nadezhda, Kardakova, Anna I., Tovpeko, Nina, Ryabchun, Sergey, Mandal, Soumen ORCID:, Morozov, Dmitry, Klemencic, Georgina ORCID:, Giblin, Sean ORCID:, Williams, Oliver ORCID:, Goltsman, Gregory N. and Klapwijk, T. M. 2017. Slow electron-phonon cooling in superconducting diamond films. IEEE Transactions on Applied Superconductivity 27 (4) , 7501104. 10.1109/TASC.2016.2638199

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We have measured the electron-phonon energy-relaxation time, τeph, in superconducting boron-doped diamond films grown on silicon substrate by chemical vapor deposition. The observed electron-phonon cooling times vary from 160 ns at 2.70 K to 410 ns at 1.8 K following a T -2-dependence. The data are consistent with the values of τeph previously reported for single-crystal boron-doped diamond films epitaxially grown on diamond substrate. Such a noticeable slow electron-phonon relaxation in boron-doped diamond, in combination with a high normal-state resistivity, confirms a potential of superconducting diamond for ultrasensitive superconducting bolometers.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Uncontrolled Keywords: Superconducting boron-doped diamond, electron–phonon time, superconducting nanobolometers.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
ISSN: 1051-8223
Date of First Compliant Deposit: 18 May 2017
Date of Acceptance: 8 November 2016
Last Modified: 05 May 2023 12:30

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