Non-equilibrium dynamics of spin and charge correlation in strongly correlated systems from pump-probe spectroscopy

The ultrafast pump-probe techniques are used to probe the elementary excitations in materials. We study the non-equilibrium process of the one-dimensional extended Hubbard model under transient laser pump pulse. In non-polarized cases, the competition between charge and spin results in bond-order-wave between spin-density-wave and charge-density-wave phases in equilibrium. We focus on the regime near the phase boundaries and how those spin and charge correlations affected by different pump pulse frequency and strength. Furthermore, in the spin-polarized systems, the Bethe strings state emerges and the non-equilibrium dynamics of the fractional excitation are investigated. The effects from photoinduced charge carriers near the phase boundaries are investigated by time evolving black decimation. These effects should be measurable by time-resolved angle-resolved photoemission spectroscopy. (LA-UR-18-30001)