title: Enhanced charge order in a photoexcited one-dimensional strongly correlated system.
abstract: We present a compelling response of a low-dimensional strongly correlated system to an external perturbation. Using the time-dependent Lanczos method we investigate a nonequilibrium evolution of the half-filled one-dimensional extended Hubbard model, driven by a transient laser pulse. When the system is close to the phase boundary, by tuning the laser frequency and strength, a sustainable charge order enhancement is found that is absent in the Mott insulating phase. We analyze the conditions and investigate possible mechanisms of emerging charge order enhancement. Feasible experimental realizations are proposed.
authors.affiliation: Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan.
authors.forename: Hantao
authors.initials: H
authors.lastname: Lu
authors.forename: Shigetoshi
authors.initials: S
authors.lastname: Sota
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Matsueda
authors.forename: Janez
authors.initials: J
authors.lastname: Bonča
authors.forename: Takami
authors.initials: T
authors.lastname: Tohyama