Slow Noncollinear Coulomb Scattering in the Vicinity of the Dirac Point in Graphene
Slow Noncollinear Coulomb Scattering in the Vicinity of the Dirac Point in Graphene
The Coulomb scattering dynamics in graphene in energetic proximity to the Dirac point is investigated by polarization resolved pump-probe spectroscopy and microscopic theory. Collinear Coulomb scattering rapidly thermalizes the carrier distribution in k directions pointing radially away from the Dirac point. Our study reveals, however, that, in almost intrinsic graphene, …