On homogeneous Hermite-Lorentz spaces of low dimension
We classify irreducible homogeneous almost Hermite-Lorentz spaces of complex dimension 3.
math.DG↗
arXiv subjects
F. Kadi
Publications and source records attributed to F. Kadi.
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 full thermalization in all directions relying on noncollinear scattering is much slower. For low photon energies, carrier-optical-phonon processes are strongly suppressed and Coulomb mediated noncollinear scattering is remarkably slow, namely on a ps timescale. This effect is very promising for infrared and THz devices based on hot carrier effects.
cond-mat.mes-hall↗