Brookhaven National Lab reveals new graphene band structure tunable by magnetic field
Researchers at Brookhaven National Laboratory used a 36 Tesla magnet to observe a previously unknown flat-band state in pristine graphene that emerges at integer multiples of an applied magnetic field, publishing the findings in Physical Review Letters. The tunable band structure could inform the design of graphene-based Hall sensors and resistance metrology standards.
Researchers at the US Department of Energy's Brookhaven National Laboratory have identified a new band structure modulation in pristine graphene when exposed to high magnetic fields. This discovery, which holds potential for advancements in quantum sensing and metrology, was achieved using a 36 Tesla magnet at the National High Magnetic Field Laboratory. The team mapped the electronic structure of graphene under various field orientations, revealing a new flat-band state at integer multiples of the magnetic field. The findings are detailed in Physical Review Letters by Dr. Kira Wong and colleagues. The researchers propose that this effect could lead to the development of ultra-sensitive Hall sensors and new standards for resistance metrology. The project received funding from DOE Basic Energy Sciences.
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