Experimental observation of the breaking and recombination of single Cooper pairs
Physical Review B
American Physical Society
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Lambert, N., Edwards, M., Esmail, A., Pollock, F., Barrett, S., Lovett, B., & Ferguson, A. (2014). Experimental observation of the breaking and recombination of single Cooper pairs. Physical Review B, 90 (140503(R))https://doi.org/10.1103/PhysRevB.90.140503
We observe the real-time breaking of single Cooper pairs by monitoring the radio-frequency impedance of a superconducting double quantum dot. The Cooper pair breaking rate in the microscale islands of our device decreases as temperature is reduced, saturating at 2 kHz for temperatures beneath 100 mK. In addition, we measure in real-time the quasiparticle recombination into Cooper pairs. Analysis of the recombination rates shows that, in contrast to bulk lms, a multi-stage recombination pathway is followed.
A.J.F. would like to acknowledge the Hitachi Research fellowship, support from Hitachi Cambridge Laboratory and support from the EPSRC grant EP/H016872/1. B.W.L. is supported by a Royal Society University Research Fellowship. F.A.P. would like to thank the Leverhulme Trust for fi nancial support.
UNI OF SOUTHAMPTON (FB EPSRC) (EP/H016872/1)
External DOI: https://doi.org/10.1103/PhysRevB.90.140503
This record's URL: https://www.repository.cam.ac.uk/handle/1810/246086
Attribution-NonCommercial 2.0 UK: England & Wales
Licence URL: http://creativecommons.org/licenses/by-nc/2.0/uk/
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