Slow Electron-Phonon Cooling in Superconducting Diamond Films

Journal article (2017)

Authors

Nadezhda Titova Moscow State University of Education
Anna I. Kardakova Moscow State University of Education
T.M. Klapwijk QN/Klapwijk Lab , QN/Kavli Nanolab Delft - AS , Kavli institute of nanoscience Delft
Nina Tovpeko Moscow State University of Education
Sergey Ryabchun Moscow State University of Education, National Research University Higher School of Economics
Soumen Mandal Cardiff University
Dmitry Morozov Cardiff University
Georgina M. Klemencic Cardiff University
Sean R. Giblin Cardiff University
Oliver A. Williams Cardiff University
Gregory Goltsman Moscow State University of Education, National Research University Higher School of Economics
Research Group
QN/Klapwijk Lab
Copyright: © 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
DOI: https://doi.org/10.1109/TASC.2016.2638199
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Published Date

01-06-2017

Language

English

Research Group

QN/Klapwijk Lab

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.