Exciton-assisted low-energy magnetic excitations in a photoexcited Mott insulator on a square lattice

Abstract

Time-resolved spectroscopies at ultrafast timescales are a powerful tool for understanding the properties of a Mott insulator on a square lattice. Here, the authors theoretically investigate the transient magnetic dynamics in a photoexcited half-filled Hubbard model and identify an increase in the two magnon weight of the Raman scattering as an exciton-assisted magnetic excitation.