Dynamical Order and Superconductivity in a Frustrated Many-Body System*

In triangular lattice structures, spatial anisotropy and frustration can lead to rich equilibrium phase diagrams with regions containing complex, highly entangled states of matter. We study the driven two-rung triangular Hubbard model and evolve these states out of equilibrium, observing how the interplay between the driving and the initial state unexpectedly shuts down the particle-hole excitation pathway. This restriction, which symmetry arguments fail to predict, dictates the transient dynamics of the system, causing the available particle-hole degrees of freedom to manifest uniform long-range order. Our results have implications for a recent experiment on photoinduced superconductivity in κ−(BEDT−TTF)2Cu[N(CN)2]Br molecules.