Energy relaxation in graphene and its measurement with supercurrent

摘要: We study inelastic energy relaxation in graphene for low energies to find out how electrons scatter with acoustic phonons and other electrons. By coupling the superconductors, we create a strong dependence of measured signal, i.e., critical Josephson current, on electron population different states. Since relative high- low-energy states is determined by scattering processes, current becomes an effective probe their strength. argue that electron-electron interaction dominant method estimate time ${\ensuremath{\tau}}_{e\ensuremath{-}e}=0.1\dots{}1$ ps at $T=500$ mK, 1-2 orders magnitude smaller than predicted normal two-dimensional diffusive systems.