Proximity screening greatly enhances electronic quality of graphene.

ABSTRACT: The electronic quality of two-dimensional systems is crucial when exploring quantum transport phenomena. In semiconductor heterostructures, decades of optimization have yielded record-quality two-dimensional gases with transport and quantum mobilities reaching close to 108 and 106 cm2 V-1 s-1, respectively1-10. Although the quality of graphene devices has also been improving, it remains comparatively lower11-17. Here we report a transformative improvement in the electronic quality of graphene by employing graphite gates placed in its immediate proximity, at 1 nm separation. The resulting screening reduces charge inhomogeneity by two orders of magnitude, bringing it down to a few 107 cm-2 and limiting potential fluctuations to less than 1 meV. Quantum mobilities reach 107 cm2 V-1 s-1, surpa

SUBMITTER: Domaretskiy D 

PROVIDER: S-EPMC12367531 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature