TY - JOUR
T1 - Antiphase oscillations in the time-resolved spin structure factor of a photoexcited Mott insulator on a square lattice
AU - Tohyama, Takami
AU - Shinjo, Kazuya
AU - Tsutsui, Kenji
N1 - Funding Information:
This work was supported by CREST (Grant No. JPMJCR1661), the Japan Science and Technology Agency, by the Japan Society for the Promotion of Science, KAKENHI (Grants No. 19H01829, No. JP19H05825, No. 17K14148, No. 21H03455) from Ministry of Education, Culture, Sports, Science, and Technology (MEXT), Japan, by JST PRESTO (Grant No. JPMJPR2013), by MEXT HPCI Strategic Programs for Innovative Research (SPIRE; hp200071), and by QST President’s Strategic Grant (QST Advanced Study Laboratory). Part of the numerical calculation was carried out using HOKUSAI at RIKEN, the supercomputer system at the information initiative center, Hokkaido University, the facilities of the Supercomputer Center at Institute for Solid State Physics, University of Tokyo, and the supercomputing facilities in QST.
Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2022/3/17
Y1 - 2022/3/17
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85127225631&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/2164/1/012049
DO - 10.1088/1742-6596/2164/1/012049
M3 - Conference article
AN - SCOPUS:85127225631
VL - 2164
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 1
M1 - 012049
T2 - 2020 International Conference on Strongly Correlated Electron Systems, SCES 2020
Y2 - 27 September 2021 through 1 October 2021
ER -