Revealing the superconducting limit of twisted bilayer graphene

In the article “Revealing the Superconducting Limit of Twisted Bilayer Graphene,” Cornell researchers explore how two slightly rotated graphene layers, known as twisted bilayer graphene, achieve superconductivity—a state where electrons flow without energy loss. The team, led by Prof. Debanjan Chowdhury, has mathematically calculated the highest superconducting temperature possible in this material, set at 60 Kelvin. Using a framework they developed in 2023, the researchers applied it to twisted bilayer graphene, uncovering factors that control superconductivity, such as electron interaction and the twist angle, which can turn the material into either an insulator or a superconductor. Their findings may guide the design of higher-temperature superconductors and applications in quantum and optoelectronics.

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