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Word and bit line operation of a 1 x 1 μm2 superconducting vortex-based memory
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum. Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för material- och miljökemi (MMK).
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum.
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum.ORCID-id: 0000-0002-3131-8658
2023 (engelsk)Inngår i: Nature Communications, E-ISSN 2041-1723, Vol. 14, nr 1, artikkel-id 4926Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The lack of dense random access memory is one of the main bottlenecks for the creation of a digital superconducting computer. In this work we study experimentally vortex-based superconducting memory cells. Three main results are obtained. First, we test scalability and demonstrate that the cells can be straightforwardly miniaturized to submicron sizes. Second, we emphasize the importance of conscious geometrical engineering. In the studied devices we introduce an asymmetric easy track for vortex motion and show that it enables a controllable manipulation of vortex states. Finally, we perform a detailed analysis of word and bit line operation of a 1 x 1 mu m(2) cell. High-endurance, non-volatile operation at zero magnetic field is reported. Remarkably, we observe that the combined word and bit line threshold current is significantly reduced compared to the bare word-line operation. This could greatly improve the selectivity of individual cell addressing in a multi-cell RAM. The achieved one square micron area is an important milestone and a significant step forward towards creation of a dense cryogenic memory.

sted, utgiver, år, opplag, sider
2023. Vol. 14, nr 1, artikkel-id 4926
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Identifikatorer
URN: urn:nbn:se:su:diva-223759DOI: 10.1038/s41467-023-40654-7ISI: 001051523700007PubMedID: 37582835Scopus ID: 2-s2.0-85168067364OAI: oai:DiVA.org:su-223759DiVA, id: diva2:1812314
Tilgjengelig fra: 2023-11-15 Laget: 2023-11-15 Sist oppdatert: 2023-11-15bibliografisk kontrollert

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Golod, TarasKrasnov, Vladimir M.

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