AI Insight
Researchers discovered that twisted bilayer graphene exhibits an extraordinarily large photoresistance response to terahertz radiation, revealing that electron-electron interactions dominate electrical conductivity in this material. By applying terahertz light, they demonstrated that the material's resistance can increase dramatically, providing direct experimental evidence that interactions between electrons, rather than defects or impurities, limit how well electricity flows through twisted bilayer graphene. This technique offers a new way to probe and understand the exotic quantum behaviors emerging in this system.
Why it matters
This finding advances our fundamental understanding of quantum materials and could inform the development of novel electronic and photonic devices based on twisted layered materials. The terahertz photoresistance technique also provides a powerful new tool for characterizing interaction-driven physics in other quantum systems.
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