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Slow electron-phonon cooling in superconducting diamond films

Titova, Nadezhda, Kardakova, Anna I., Tovpeko, Nina, Ryabchun, Sergey, Mandal, Soumen, Morozov, Dmitry, Klemencic, Georgina, Giblin, Sean, Williams, Oliver, 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: 21 Aug 2022 08:15

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