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

Takami Tohyama, Kazuya Shinjo, Kenji Tsutsui

Research output: Contribution to journalConference articlepeer-review

Abstract

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.

Original languageEnglish
Article number012049
JournalJournal of Physics: Conference Series
Volume2164
Issue number1
DOIs
Publication statusPublished - 17 Mar 2022
Event2020 International Conference on Strongly Correlated Electron Systems, SCES 2020 - Campinas, Virtual, Brazil
Duration: 27 Sep 20211 Oct 2021

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