Relaxation dynamics of photocarrieres in one-dimensional Mott insulators coupled to phonons

Matsueda, Hiroaki*; Sota, Shigetoshi*; Toyama, Takami*; Maekawa, Sadamichi

We examine recombination processes of photocarriers in one-dimensional Mott insulators coupled to phonons. Performing density matrix renormalization group calculations, we find that, even for small electron, phonon coupling, many phonons are generated dynamically, which cause initial relaxation process after the irradiation. At the same time, spin charge coupling coming from mixing of high- and low-energy states by the irradiation is suppressed. We discuss differences between Mott and band insulators in terms of relaxation dynamics.