Photo-Manipulation of Superconductivity in an Extended Hubbard Model

Photo-induced phase transition is a promising approach to engineering material properties and has been demonstrated experimentally in several strongly correlated systems. Here, we numerically study intertwined orders involving charge, spin, and superconductivity in an extended Hubbard model by exact diagonalization on a 16-site square cluster. Our ground-state phases at various carrier doping match previous studies based on mean-field and functional renormalization group methods. On top of the equilibrium ground states, we then investigate the non-equilibrium dynamics of various orders during and after a realistic pump pulse. We found that these intertwined orders and superconducting pairing symmetries can be selectively manipulated through light polarization, frequency, and amplitude. This work shows that using ultrafast light to control superconductivity of desired pairing symmetry is possible.