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Photoinduced phase switching from Mott insulator to metallic state in the quarter-filled Peierls-Hubbard model
Can Shao, Takami Tohyama, Hantao Lu
https://arxiv.org/abs/2406.01110

Photoinduced phase switching from Mott insulator to metallic state in the quarter-filled Peierls-Hubbard model
Utilizing the exact diagonalization method, we investigate the one-dimensional Peierls-Hubbard model at quarter filling, where it manifests as an antiferromagnetic Mott insulator in units of dimers. By increasing the on-site Coulomb repulsion U, we observe a significant suppression of the Drude peak, based on a nonequilibrium linear response theory capable of capturing the zero-frequency (Drude) weight of the optical conductivity under periodic boundary conditions. However, after the ultrafast …