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Regular version of the site

Article

Slow Electron-Phonon Cooling in Superconducting Diamond Films

IEEE Transactions on Applied Superconductivity. 2017. Vol. 27. No. 4. P. 1-4.
Titova N., Kardakova A., Tovpeko N., Ryabchun S., Mandal S., Morozov D., Klemencic G., Giblin S., Williams O., Goltsman G., Klapwijk T.

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.