Nature Electronics, Published online: 18 August 2026; doi:10.1038/s41928-026-01685-2 An amorphous carbon film with a dielectric constant of 1.35 can act as a robust ion-diffusion barrier, even at a thickness of 0.8 nm.
Atomically thin amorphous carbon with an ultralow dielectric constant
Barbaros Ӧzyilmaz