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.
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