Slow electron-phonon cooling in superconducting diamond films

Titova, Nadezhda, Kardakova, Anna I., Tovpeko, Nina, Ryabchun, Sergey, Mandal, Soumen ORCID: https://orcid.org/0000-0001-8912-1439, Morozov, Dmitry, Klemencic, Georgina ORCID: https://orcid.org/0000-0002-2125-9754, Giblin, Sean ORCID: https://orcid.org/0000-0003-1876-8619, Williams, Oliver ORCID: https://orcid.org/0000-0002-7210-3004, 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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Abstract

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:	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
URI:	https://orca.cardiff.ac.uk/id/eprint/99459

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