Graphene combines computer logic and memory in a single device (2024)

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A sheet of graphene sandwiched between electrolytes can host independently tunable proton and electron currents — setting the stage for a device that serves both computer-memory and logic functions.

  1. Manu Jaiswal

    1. Manu Jaiswal is in the Department of Physics, Indian Institute of Technology Madras, Chennai 600036, India.

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Graphene, a thin sheet of carbon atoms, is similar to a metal in that its electrons move freely in the plane of the sheet, forming a dense cloud that usually prevents other particles and ions from moving through it. However, an electric field can enable protons to permeate the sheet, from top to bottom, turning graphene into a kind of sieve1. Some protons bind to the electrons in the cloud, creating defects that, in turn, scatter the remaining electrons as they flow through the sheet. The result is similar to an unregulated traffic intersection: electrons moving in one direction clash with protons coming from another. Writing in Nature, Tong et al.2 report a way of taming these protons and electrons to generate two independent currents.

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Nature 630, 573-574 (2024)

doi: https://doi.org/10.1038/d41586-024-01642-z

References

  1. Hu, S. et al. Nature 516, 227–230 (2014).

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  2. Tong, J. et al. Nature 630, 619–624 (2024).

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  3. Elias, D. C. et al. Science 323, 610–613 (2009).

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  4. Li, S. et al. Nature Electron. 4, 254–260 (2021).

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Competing Interests

The author declares no competing interests.

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Subjects

  • Condensed-matter physics
  • Graphene
  • Physics

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Related Articles

  • Read the paper: Control of proton transport and hydrogenation in double-gated graphene

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Graphene combines computer logic and memory in a single device (2024)
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