Graphene charge carriers lying on different energetic levels, represented by the Dirac cones, which, depending on the number of charge carriers, reach the neutral point (blue level on the left cone) or far into the conduction band (blue level on the right cone). In both cases, the photoexcited charge carriers relax with faster (left side) or slower (right side) dynamics. Photo credit: Politecnico di Milano – CNR An international study published in…