Scientists have observed superballistic electron flow in a two-dimensional system, a phenomenon that challenges the traditional understanding of electron transport. This behavior, characterized by a conductance exceeding the fundamental quantum ballistic limit, occurs in point contacts where electrons move like a viscous fluid. The study reveals that edge magnetoplasmons, collective electron excitations traveling along the material's edges, are responsible for this unusual transport, opening new avenues for the design of high-efficiency electronic devices.

Electron transport in two-dimensional materials has been a field of intense research, especially with the discovery of graphene and other analogous materials. In ballistic systems, electrons move without scattering, and conductance is quantized in multiples of G₀ = 2e²/h. However, the superballistic flow observed in this work goes beyond this limit, suggesting a collective transport mechanism where electron-electron interactions play a crucial role. This phenomenon is analogous to superdiffusion in classical fluids, where particles move more efficiently than expected.

The key to this discovery lies in the excitation of edge magnetoplasmons in the point contacts. These collective modes, which arise in the presence of a magnetic field, allow energy to propagate very efficiently, dragging electrons through the narrow channel of the contact. The observation of this superballistic flow not only expands our understanding of the physics of electron transport in low-dimensional systems but also offers significant potential for the development of new electronic devices that operate with extremely low energy dissipation, overcoming the limitations of current approaches based on conventional ballistic transport.