Researchers from the National Institute of Standards and Technology

Researchers from the National Institute of Standards and Technology (NIST) and an international team of collaborators have developed a quantum ruler to measure and explore the unique properties of twisted graphene sheets, known as moiré quantum matter. These materials can exhibit their own magnetic fields, become superconductors with zero electrical resistance, or turn into perfect insulators, depending on the twist angle.

The team created a moiré quantum matter device by stacking two layers of graphene and twisting them relative to another two layers. They then used a scanning tunneling microscope to measure and manipulate the energy levels of electrons in the layers of graphene by varying the strength of a magnetic field. The researchers found evidence of a new quantum ruler at play, which promises to shed new light on the magnetic properties of these moiré quantum materials. The findings have applications in the optimization of quantum materials for microelectronics and related fields, as well as the potential development of a new portable standard for electrical resistance.

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1. Source: Coherent Market Insights, Public sources, Desk research
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Anuja Kumari

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