2020/07/31 by Anna Kauch, Paul Worm, Paul Prauhart +3 · 1 voice
Physics and Astronomy · #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.102.245125
published as Phys. Rev. B 102, 245125 (2020) · 16 pages, 25 figures
arxiv published 2020/07/31 · arxiv created 2020/12/23 · arxiv updated 2020/12/24
We perform time-resolved exact diagonalization of the Hubbard model with time dependent hoppings on small clusters of up to 12 sites. Here, the time dependence originates from a classic electromagnetic pulse, which mimics the impact of a photon. We investigate the behavior of the double occupation and spectral function after the pulse for different cluster geometries and on-site potentials. We find impact ionization in all studied geometries except for one-dimensional chains. Adding next-nearest neighbor hopping to the model leads to a significant enhancement of impact ionization, as does disorder and geometric frustration of a triangular lattice.