Quasiparticle relaxation in optically excited high-Q superconducting resonators
Superconductivity
2008-06-25 v2 Mesoscale and Nanoscale Physics
Abstract
The quasiparticle relaxation time in superconducting films has been measured as a function of temperature using the response of the complex conductivity to photon flux. For tantalum and aluminium, chosen for their difference in electron-phonon coupling strength, we find that at high temperatures the relaxation time increases with decreasing temperature, as expected for electron-phonon interaction. At low temperatures we find in both superconducting materials a saturation of the relaxation time, suggesting the presence of a second relaxation channel not due to electron-phonon interaction.
Keywords
Cite
@article{arxiv.0802.0640,
title = {Quasiparticle relaxation in optically excited high-Q superconducting resonators},
author = {R. Barends and J. J. A. Baselmans and S. J. C. Yates and J. R. Gao and J. N. Hovenier and T. M. Klapwijk},
journal= {arXiv preprint arXiv:0802.0640},
year = {2008}
}
Comments
4 pages, 3 figures