NIST is developing a new resistance standard based on the Quantum Hall Effect to replace the traditional materials used for decades. This work focuses on using graphene, a single layer of carbon atoms, which allows for more stable measurements at higher temperatures than current devices. By updating this foundation of the global electrical measurement system, the goal is to provide a more practical and robust standard for scientists and industries worldwide.
The project also investigates a related phenomenon called the Fractional Quantum Hall Effect in bilayer graphene, which is relevant for future quantum computing technologies. Researchers are building specialized microscopy tools to map how electrons move in these materials under magnetic fields. Although a specific completion date has not been announced, the team is actively refining the measurement methods needed to transition to this new graphene-based standard.
Source: https://www.nist.gov/programs-projects/integer-and-fractional-quantum-hall-effect
Keywords: graphene, quantum Hall effect, scanning probe microscopy
