Abstract: International audience; Using a real-time implementation of the self-consistent GW method, we theoretically investigate the photoinduced changes in the electronic structure of the quasi two-dimensional semi-metal BaNiS2. This material features four Dirac cones in the unit cell and our simulation of the time-and momentum-resolved nonequilibrium spectral function reveals a flattening of the Dirac bands after a photo-doping pulse with a 1.5 eV laser. The simulation results are consistent with the recently reported experimental data on photo-doped ...
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