Chinese scientists detect rare quantum friction in folded graphene

Chinese scientists from the Lanzhou Institute of Chemical Physics, led by Professors Zhang Junyan and Gong Zhenbin, have experimentally observed quantum friction in folded graphene for the first time. By precisely folding graphene layers to create controlled curvature and internal strain, they altered electron behavior at the nanoscale. This strain forced electrons into fixed energy states called pseudo-Landau levels, reducing energy loss as heat and resulting in a nonlinear, sometimes decreasing friction pattern as the number of graphene layers increased. Their findings challenge classical friction models and provide the first direct evidence of quantum friction occurring between two solid surfaces. The research, conducted at ultra-low temperatures using a carefully engineered graphene system, opens new avenues for understanding friction at the atomic scale. The team plans to investigate whether similar quantum friction effects occur in other materials and under more practical conditions. Ultimately, this work could lead to technologies that better manage or minimize energy loss in nanoscale electronics and quantum computing devices by exploiting quantum friction phenomena. The study was published in Nature Communications