2022 Katharine B. Gebbie Young Investigator Award - Albert Rigosi

For using the quantum hall effect in graphene for defining the ohm.

Did you know that the United States recently became the first nation to use graphene in how the unit of the ohm is defined? Monolayer epitaxial graphene has been shown to have clearly superior properties for the improvement of devices whose function depend on the quantum Hall effect and serve a critical role in defining electrical units for US industries. Recent progress in device development will be summarized, including: (1) Stabilizing and controlling graphene’s electron density over centimeter scales to ensure viable commercialization. (2) Expanding the utility of these graphene-based devices by creating arrays that use superconducting electrical contacts. (3) Exploring p-n junctions as a possible future device to access many different quantum Hall resistance values.