Slow Electron-Phonon Cooling in Superconducting Diamond Films

Slow Electron-Phonon Cooling in Superconducting Diamond Films

Titova, Nadezhda (Moscow State University of Education)
Kardakova, Anna I. (Moscow State University of Education)
Tovpeko, Nina (Moscow State University of Education)
Ryabchun, Sergey (National Research University Higher School of Economics; Moscow State University of Education)
Mandal, Soumen (Cardiff University)
Morozov, Dmitry (Cardiff University)
Klemencic, Georgina M. (Cardiff University)
Giblin, Sean R. (Cardiff University)
Williams, Oliver A. (Cardiff University)
Goltsman, Gregory N. (National Research University Higher School of Economics; Moscow State University of Education)
Klapwijk, T.M. (TU Delft QN/Klapwijk Lab; TU Delft QN/Kavli Nanolab Delft; Kavli institute of nanoscience Delft)

2017-06-01

We have measured the electron-phonon energy-relaxation time, τ_eph, 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 τ_eph 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.

electron-phonon time
Superconducting boron-doped diamond
superconducting nanobolometers

http://resolver.tudelft.nl/uuid:5aff5581-8f54-451d-a740-e75a203258e8

https://doi.org/10.1109/TASC.2016.2638199

1051-8223

IEEE Transactions on Applied Superconductivity, 27 (4)

Institutional Repository

journal article

© 2017 Nadezhda Titova, Anna I. Kardakova, Nina Tovpeko, Sergey Ryabchun, Soumen Mandal, Dmitry Morozov, Georgina M. Klemencic, Sean R. Giblin, Oliver A. Williams, Gregory N. Goltsman, T.M. Klapwijk