TY - JOUR
T1 - Experimental observation of the breaking and recombination of single Cooper pairs
AU - Lambert, N.J.
AU - Edwards, M.
AU - Esmail, A.A.
AU - Pollock, F.A.
AU - Barrett, S.D.
AU - Lovett, B.W.
AU - Ferguson, A.J.
N1 - A.J.F. would like to acknowledge the Hitachi Research fellowship, support from Hitachi Cambridge Laboratory, and support from the EPSRC Grant No. 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 financial support.
PY - 2014/10/9
Y1 - 2014/10/9
N2 - 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 films, a multistage recombination pathway is followed.
AB - 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 films, a multistage recombination pathway is followed.
UR - https://www.scopus.com/pages/publications/84908032676
U2 - 10.1103/PhysRevB.90.140503
DO - 10.1103/PhysRevB.90.140503
M3 - Article
AN - SCOPUS:84908032676
SN - 1098-0121
VL - 90
JO - Physical Review. B, Condensed matter and materials physics
JF - Physical Review. B, Condensed matter and materials physics
IS - 14
ER -