Publikation: Flux-periodicity crossover from h/2e to h/e in aluminium nano-loops
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2018
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Sharon, Omri J.
Shaulov, Avner
Yeshurun, Yosef
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Journal of Physics: Conference Series. 2018, 969, 012063. ISSN 1742-6588. eISSN 1742-6596. Available under: doi: 10.1088/1742-6596/969/1/012063
Zusammenfassung
We study the magnetoresistance of aluminium 'double-networks' formed by connecting the vertexes of nano-loops with relatively long wires, creating two interlaced subnetworks of small and large loops (SL and LL, respectively). Far below the critical temperature, Aharonov-Bohm like quantum interference effects are observed for both the LL and the SL subnetworks. When approaching T c, both exhibit the usual Little-Parks oscillations, with periodicity of the superconducting flux quantum Φ 0 =h/2e. For one sample, with a relatively large coherence length, ξ, at temperatures very close to T c, the Φ 0 periodicity of the SL disappears, and the waveform of the first period is consistent with that predicted recently for loops with a size a < ξ, indicating a crossover to 2Φ 0 periodicity.
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ESPY, Christopher, Omri J. SHARON, Julian BRAUN, Rebekka GARREIS, Florian STRIGL, Avner SHAULOV, Paul LEIDERER, Elke SCHEER, Yosef YESHURUN, 2018. Flux-periodicity crossover from h/2e to h/e in aluminium nano-loops. In: Journal of Physics: Conference Series. 2018, 969, 012063. ISSN 1742-6588. eISSN 1742-6596. Available under: doi: 10.1088/1742-6596/969/1/012063BibTex
@article{Espy2018-04-19Fluxp-43577,
year={2018},
doi={10.1088/1742-6596/969/1/012063},
title={Flux-periodicity crossover from h/2e to h/e in aluminium nano-loops},
volume={969},
issn={1742-6588},
journal={Journal of Physics: Conference Series},
author={Espy, Christopher and Sharon, Omri J. and Braun, Julian and Garreis, Rebekka and Strigl, Florian and Shaulov, Avner and Leiderer, Paul and Scheer, Elke and Yeshurun, Yosef},
note={Article Number: 012063}
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<dcterms:abstract xml:lang="eng">We study the magnetoresistance of aluminium 'double-networks' formed by connecting the vertexes of nano-loops with relatively long wires, creating two interlaced subnetworks of small and large loops (SL and LL, respectively). Far below the critical temperature, Aharonov-Bohm like quantum interference effects are observed for both the LL and the SL subnetworks. When approaching T <sub>c</sub>, both exhibit the usual Little-Parks oscillations, with periodicity of the superconducting flux quantum Φ <sub>0</sub> =h/2e. For one sample, with a relatively large coherence length, ξ, at temperatures very close to T <sub>c</sub>, the Φ <sub>0</sub> periodicity of the SL disappears, and the waveform of the first period is consistent with that predicted recently for loops with a size a < ξ, indicating a crossover to 2Φ <sub>0</sub> periodicity.</dcterms:abstract>
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