Heidelberg Theoretical Physics Colloquium
May 14, 2012

Jörg Schmalian (KIT)

Non-equilibrium dynamics in graphene: hydrodynamics and stimulated emission of photo-excited fermions

We present a theory for the non-equilibrium dynamics of monolayer graphene, addressing the hydrodynamics near equilibrium and the ultrafast dynamics following an intense Laser pulse. The emergence of a quasi-conservation of the electron and hole numbers allows for the determination of the d.c. conductivity and shear viscosity, making clean graphene a quantum critical weak metal and an almost perfect fluid with tendency towards electron turbulence. The same quasi-conservation law leads to photo-induced femtosecond nonlinear saturation, transparency and stimulated infrared emission of extremely dense fermions in graphene monolayers.