Antiphase oscillations in the time-resolved spin structure factor of a photoexcited Mott insulator on a square lattice

Autor:	Takami Tohyama, Kazuya Shinjo, Kenji Tsutsui
Rok vydání:	2022
Předmět:	History Computer Science Applications Education
Zdroj:	Journal of Physics: Conference Series. 2164:012049
ISSN:	1742-6596 1742-6588
DOI:	10.1088/1742-6596/2164/1/012049
Popis:	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 18 × 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 B 1g bimagnon Raman intensity. Observing such antiphase oscillations will be a big challenge for time-resolved resonant elastic x-ray scattering experiments.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::853ec5f4fc147b57dd4c1ffcfa2c3abe https://doi.org/10.1088/1742-6596/2164/1/012049 Zobrazit plný text záznamu