Physics Colloquium: Graphene and the new generation of quantum Hall resistance standard
Dr. Yanfei Yang, National Institute of Standards and Technology (NIST)
Abstract: NIST has been conducting cutting-edge research on graphene to develop quantum Hall resistance standard (QHRS) that is used to disseminate those end-user-friendly standards throughout the nation. Among a few of bottom-up synthesis approaches, the high temperature sublimation of silicon carbide substrate is so far the best method to produce high-quality graphene for metrological application. Compared to QHRS based on GaAs heterostructure, graphene empowers a new generation of QHRS that is more economical and accessible. I will describe the challenges to develop and commercialize graphene-based quantum Hall resistance standard (G-QHRS), including material synthesis, device fabrication, QHRS testing, and the unique calibration market. I will also share my view of the key technologies required for a successful G-QHRS product in the future.