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Word and bit line operation of a 1 × 1 μm2 superconducting vortex-based memory

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  • Taras Golod

    (Stockholm University, AlbaNova University Center)

  • Lise Morlet-Decarnin

    (Stockholm University, AlbaNova University Center)

  • Vladimir M. Krasnov

    (Stockholm University, AlbaNova University Center)

Abstract

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 × 1 μm2 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.

Suggested Citation

  • Taras Golod & Lise Morlet-Decarnin & Vladimir M. Krasnov, 2023. "Word and bit line operation of a 1 × 1 μm2 superconducting vortex-based memory," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-40654-7
    DOI: 10.1038/s41467-023-40654-7
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    References listed on IDEAS

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