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Demonstration of a superconducting diode-with-memory, operational at zero magnetic field with switchable nonreciprocity
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics.ORCID iD: 0000-0002-3131-8658
Number of Authors: 22022 (English)In: Nature Communications, E-ISSN 2041-1723, Vol. 13, no 1, article id 3658Article in journal (Refereed) Published
Abstract [en]

Superconducting diodes, operational at zero magnetic field, can be used in supercomputers. Here, the authors demonstrate prototypes of diodes-with-memory, based on Nb Josephson junctions, with a large and switchable nonreciprocity at zero field. Diode is one of the basic electronic components. It has a nonreciprocal current response, associated with a broken space/time reversal symmetry. Here we demonstrate prototypes of superconducting diodes operational at zero magnetic field. They are based on conventional niobium planar Josephson junctions, in which space/time symmetry is broken by a combination of self-field effect from nonuniform bias and stray fields from a trapped Abrikosov vortex. We demonstrate that nonreciprocity of critical current in such diodes can reach an order of magnitude and rectification efficiency can exceed 70%. Furthermore, we can easily change the diode polarity and switch nonreciprocity on/off by changing the bias configuration and by trapping/removing of a vortex. This facilitates a memory functionality. We argue that such a diode-with-memory can be used for a future generation of in-memory superconducting computers.

Place, publisher, year, edition, pages
2022. Vol. 13, no 1, article id 3658
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:su:diva-207428DOI: 10.1038/s41467-022-31256-wISI: 000818961600001PubMedID: 35760801OAI: oai:DiVA.org:su-207428DiVA, id: diva2:1684603
Available from: 2022-07-27 Created: 2022-07-27 Last updated: 2023-03-28Bibliographically approved

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Golod, TarasKrasnov, Vladimir M.

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