@article{oai:repo.qst.go.jp:00085658,
 author = {Tohyama, Takami and Shinjo, Kazuya and Tsutsui, Kenji and Kenji, Tsutsui},
 journal = {Journal of Physics: Conference Series},
 month = {Mar},
 note = {We investigate momentum-dependent transient spin dynamics after photoirradiation in a two-dimensional Mott insulator described by a half-filled Hubbard model on a square lattice by using a numerically exact-diagonalization technique.  We find a temporal oscillation in the static spin structure factor of a square-root 18 times square-root 18 periodic lattice.  The oscillation exhibits an antiphase behavior between, for example, two orthogonal momentum directions parallel and perpendicular to the electric field of a pump pulse.  The origin of the antiphase oscillation is attributed to a photoexcited wave function that has overlap with eigenstates producing the B1g bimagnon Raman intensity.  Observing such antiphase oscillations will be a big challenge for time-resolved resonant elastic x-ray scattering experiments.},
 title = {Antiphase oscillations in the time-resolved spin structure factor of a photoexcited Mott Insulator on a square lattice},
 volume = {2164},
 year = {2022}
}