Evidence of Cooper-pair pumping with combined flux and voltage control

Niskanen, Antti O.; Kivioja, Jani; Seppä, Heikki; Pekola, Jukka

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Evidence of Cooper-pair pumping with combined flux and voltage control

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Title:	Evidence of Cooper-pair pumping with combined flux and voltage control
Author(s):	Niskanen, Antti O. ; Kivioja, Jani ; Seppä, Heikki ; Pekola, Jukka
Date:	2005-01-26
Language:	en
Pages:	4 1-4
Department:	Department of Applied Physics
Series:	PHYSICAL REVIEW B, Volume 71, issue 1
ISSN:	2469-9950 1550-235X
DOI-number:	10.1103/PhysRevB.71.012513
Keywords:	combined flux, Cooper-pair pumping, voltage control
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Citation: Niskanen , A O , Kivioja , J , Seppä , H & Pekola , J 2005 , ' Evidence of Cooper-pair pumping with combined flux and voltage control ' , Physical Review B , vol. 71 , no. 1 , 012513 , pp. 1-4 . https://doi.org/10.1103/PhysRevB.71.012513
Abstract: We have experimentally demonstrated pumping of Cooper pairs in a single-island mesoscopic structure. The island was connected to leads through SQUID (superconducting quantum interference device) loops. Synchronized flux and voltage signals were applied whereby the Josephson energies of the SQUIDs and the gate charge were tuned adiabatically. From the current-voltage characteristics one can see that the pumped current increases in 1e steps which is due to quasiparticle poisoning on the measurement time scale, but we argue that the transport of charge is due to Cooper pairs.

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