Periodicity in Al/Ti superconducting single electron transistors

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date

2009

Department

Department of Applied Physics

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Language

en

Pages

3

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Applied Physics Letters, Volume 95, issue 5, pp. 1-3

Abstract

We present experiments on single Cooper-pair transistors made of two different superconducting materials. We chose Ti and Al to create an energy gap profile such that the island has a higher gap than the leads, thereby acting as a barrier to quasiparticle tunneling. Our transport measurements demonstrate that quasiparticle poisoning is suppressed in all our TiAlTi structures (higher gap for the island) with clear 2e periodicity observed, whereas full quasiparticle poisoning is observed in all AlTiAl devices (higher gap for the leads) with e periodicity.

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Keywords

aluminium alloys, energy gap, quasiparticles, single electron transistors, superconducting materials, titanium alloys

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DOI

10.1063/1.3194777

Citation

MacLeod, S J, Kafanov, S & Pekola, J P 2009, 'Periodicity in Al/Ti superconducting single electron transistors', Applied Physics Letters, vol. 95, no. 5, 052503, pp. 1-3. https://doi.org/10.1063/1.3194777

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https://urn.fi/URN:NBN:fi:aalto-202510087913

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[article-cris] Perustieteiden korkeakoulu / SCI