We report the performance of a quantum standard based on epitaxial graphene maintained in a 5 T table-top cryocooler system. The ν = 2 resistance plateau, with a value of RK-90/2, is used to scale to 1 kΩ, allowing comparisons of the performance of a binary cryogenic current comparator (BCCC) bridge and a room-temperature direct current comparator (DCC). The preliminary uncertainties achieved with the DCC are about 1 part in 108, while the BCCC uncertainty is like that obtained in state-of-the-art measurements using GaAs-based devices. This quantum standard requires no liquid He and can operate continuously, allowing year-round accessibility to traceable resistance measurements.
Proceedings Title: IEEE Proceedings
Conference Dates: July 8-14, 2018
Conference Location: Paris, -1
Conference Title: Conference on Precision Electromagnetic Measurements (CPEM) 2018
Pub Type: Conferences
quantized Hall resistance, epitaxial graphene, binary cryogenic current comparator, direct current comparator, standard resistor