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Substrate-dependent quasiparticle recombination time in superconducting resonators

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Vercruyssen, N., Barends, R., Klapwijk, Teunis Martien, Muhonen, Juha, Meschke, M. and Pekola, Jukka (2011) Substrate-dependent quasiparticle recombination time in superconducting resonators. Applied Physics Letters, Vol.99 (No.6). 062509. doi:10.1063/1.3624463

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Official URL: http://dx.doi.org/10.1063/1.3624463

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Abstract

We demonstrate an increased quasiparticle recombination time in superconducting resonators on a SiN(x) membrane, compared to identical resonators on a SiN(x)/Si wafer. An interpretation is given using a thermal model of the membrane. Using an array of tunnel junctions to cool or heat the membrane, we show that the resonators on the membranes are extremely sensitive to small changes of the phonon temperature, which renders them excellent phonon thermometers with a noise level equivalent to 5 mu K/root Hz. The experimental set-up is in principle an ideal platform to study the interplay of quasiparticles and phonon populations in superconductors.

Item Type: Journal Article
Subjects: Q Science > QC Physics
T Technology > TP Chemical technology
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): Quasiparticles (Physics), Superconductors, Resonators, Membranes (Technology)
Journal or Publication Title: Applied Physics Letters
Publisher: American Institute of Physics
ISSN: 0003-6951
Official Date: 8 August 2011
Dates:
DateEvent
8 August 2011Published
Volume: Vol.99
Number: No.6
Page Range: 062509
DOI: 10.1063/1.3624463
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: Engineering and Physical Sciences Research Council (EPSRC), European Community (EC)
Grant number: EP/F040784/1 (EPSRC), 228464 (EC)

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