NIST researchers have developed a “quantum ruler” using twisted sheets of graphene to measure exotic properties of moiré quantum matter. The twisted graphene bilayers, when cooled to near absolute zero, exhibit unique magnetic and electronic properties that can be measured using a scanning tunneling microscope. The quantum ruler allows researchers to study how electrons in these materials respond to magnetic fields, potentially leading to new standards for electrical resistance that could be used directly in manufacturing facilities. The findings could advance the development of ultrathin superconductors and other quantum materials for microelectronics applications.
Keywords: superconductors, magnetic properties, moiré quantum matter, twisted graphene, quantum ruler, electronic properties, electrical resistance, quantum Hall effect
