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

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

2007-07-05

arxiv.org/abs/0707.0732v1

Physics

Condensed Matter

Superconductivity

3 pages, 3 figures

Scientific paper

10.1063/1.2768897

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 340 mK. Contrary to the results of the Al sample, we were not able to detect 2e-periodicity under any conditions on similar samples with Nb island. We attribute this to the material properties of Nb.

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