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American Institute of Physics, Applied Physics Letters, 6(91), p. 063512

DOI: 10.1063/1.2768897

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Parity effect in Al and Nb single electron transistors in a tunable environment

Journal article published in 2007 by A. M. Savin, M. Meschke, Jukka P. Pekola, Y.-U. A. Pashkin ORCID, T. F. Li, H. Im, J. S. Tsai
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This paper is available in a repository.

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Abstract

Two different types of Cooper pair transistors, with Al and Nb islands, have been investigated in a tunable electromagnetic environment. The device with an Al island demonstrates gate charge modulation with 2e periodicity in a wide range of environmental impedances at bath temperatures below 340mK. Contrary to the results of the Al sample, the authors were not able to detect 2e periodicity under any conditions on similar samples with Nb island. The authors attribute this to the material properties of Nb. ; Peer reviewed