@article{oai:repo.qst.go.jp:00085808,
 author = {Tohyama, Takami and Shinjo, Kazuya and Sota, Shigetoshi and Tsutsui, Kenji and Kenji, Tsutsui},
 journal = {Journal of Physics: Conference Series},
 month = {Mar},
 note = {We numerically investigate spectroscopic properties for a two-dimensional Mott insulator described by a half-filled Hubbard model on the square lattice. Firstly, we examine the spectral shape of the optical conductivity by using time-dependent density-matrix renormalization group implemented by the Legendre polynomial expansion. We find a shape peak resembling to an excitonic peak at absorption edge, whose origin is attributable to antiferromagnetic
correlation in the spin background. We next investigate momentum-dependent transient charge and spin dynamics after photoirradiation by using time-dependent Lanczos-type exact diagonalization. We find a temporal oscillation in the intensity of the dynamical spin structure factor, which exhibits an antiphase behavior between, for example, two orthogonal momentum
directions parallel and perpendicular to the electric field of a pump pulse. Observing such antiphase oscillations will be a big challenge for time-resolved resonant-inelastic x-ray scattering experiments.},
 title = {Numerical simulations of spectroscopic properties in two-dimensional Mott insulator},
 volume = {2207},
 year = {2022}
}