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Demonstration of a superconducting diode-with-memory, operational at zero magnetic field with switchable nonreciprocity
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum.
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum.ORCID-id: 0000-0002-3131-8658
Antal upphovsmän: 22022 (Engelska)Ingår i: Nature Communications, E-ISSN 2041-1723, Vol. 13, nr 1, artikel-id 3658Artikel i tidskrift (Refereegranskat) 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.

Ort, förlag, år, upplaga, sidor
2022. Vol. 13, nr 1, artikel-id 3658
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URN: urn:nbn:se:su:diva-207428DOI: 10.1038/s41467-022-31256-wISI: 000818961600001PubMedID: 35760801OAI: oai:DiVA.org:su-207428DiVA, id: diva2:1684603
Tillgänglig från: 2022-07-27 Skapad: 2022-07-27 Senast uppdaterad: 2023-03-28Bibliografiskt granskad

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Golod, TarasKrasnov, Vladimir M.

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