Nick Abbott

In a stunning breakthrough, electrons in graphene have exhibited behavior long considered impossible by physicists. At the material's Dirac point—a critical electronic state where graphene is neither fully a metal nor an insulator—the electrons cease behaving like individual particles and instead flow collectively as a nearly perfect quantum liquid. This strange fluid is extraordinarily smooth, with a viscosity so low it rivals the ultra-hot plasma that existed in the early universe or is recreated in modern particle accelerators—far smoother than any known behavior in ordinary solid matter. The most shocking discovery: heat and electric charge decoupled completely, resulting in the largest violation ever observed of the Wiedemann–Franz law. This fundamental rule, which has held for over a century in all conventional metals, states that heat and electrical conductivity should move in lockstep. In graphene's quantum fluid, however, the ratio deviated by more than 200 times from the expected value. This makes graphene far more than just a wonder material—it serves as a remarkable laboratory for exploring extreme quantum phenomena once thought observable only in black holes, quark-gluon plasmas, or the conditions inside massive particle colliders. Beyond its fundamental importance, this ultra-clean, highly responsive quantum behavior could lead to revolutionary applications, including next-generation ultra-sensitive sensors capable of detecting minute electrical or magnetic fields with unprecedented precision. ["Universality in quantum critical flow of charge and heat in ultraclean graphene." Nature Physics, 13 August 2025]