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SINIS turnstile for quantum current standards

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Publication date12/09/2014
Host publicationCPEM 2014 - 29th Conference on Precision Electromagnetic Measurements, Digest
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages660-661
Number of pages2
ISBN (Electronic)9781479952052
<mark>Original language</mark>English
Event29th Conference on Precision Electromagnetic Measurements, CPEM 2014 - Rio de Janeiro, Brazil
Duration: 24/08/201429/08/2014

Conference

Conference29th Conference on Precision Electromagnetic Measurements, CPEM 2014
Country/TerritoryBrazil
CityRio de Janeiro
Period24/08/1429/08/14

Publication series

NameCPEM Digest (Conference on Precision Electromagnetic Measurements)
ISSN (Print)0589-1485

Conference

Conference29th Conference on Precision Electromagnetic Measurements, CPEM 2014
Country/TerritoryBrazil
CityRio de Janeiro
Period24/08/1429/08/14

Abstract

Single electron pumping by a SINIS turnstile is investigated up to 1 GHz in various conditions to realize a quantum current standard. A standard deviation of the pumping current at 100 MHz is about 10-4 at base temperature of a dilution refrigerator. As expected, the plateau of the pumped current degrades as temperature increases because of the thermal smearing of Fermi energy of a normal metal island. On the other hand, an externally applied magnetic fields dramatically suppresses excess current on the single electron pumping plateau. This originates from the quasiparticle relaxation enhancement due to the penetration of the magnetic vortices into the superconducting leads.