Photoinduced $\eta$ pairing in the Kondo lattice model

Abstract

The previous theoretical study has shown that pulse irradiation to the Mott insulating state in the Hubbard model can induce the enhancement of superconducting correlation due to the generation of $\eta$ pairs. Here, we show that the same mechanism can be applied to the Kondo lattice model, an effective model for heavy electron systems, by demonstrating that the pulse irradiation indeed enhances the $\eta$-pairing correlation. As in the case of the Hubbard model, the non-linear optical process is essential to increase the number of photoinduced $\eta$ pairs and thus the enhancement of the superconducting correlation. We also find the diffusive behavior of the spin dynamics after the pulse irradiation, suggesting that the increase of the number of $\eta$ pairs leads to the decoupling between the conduction band and the localized spins in the Kondo lattice model, which is inseparably related to the photodoping effect.

arXiv comment14 pages, 5 figures

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Cited by in corpus (9)

• Photo-induced nonequilibrium states in Mott insulators
• Charge stiffness and long-range correlation in the optically induced $\eta$-pairing state of the one-dimensional Hubbard model
• Spatial, spin, and charge symmetry projections for a Fermi-Hubbard model on a quantum computer
• $\eta$-pairing in correlated fermion models with spin-orbit coupling
• Antiphase Oscillations in the Time-Resolved Spin Structure Factor of a Photoexcited Mott Insulator
• Floquet engineering multi-channel Kondo physics
• Exciton-assisted low-energy magnetic excitations in a photoexcited Mott insulator on a square lattice
• Charge carrier relaxation dynamics in the one-dimensional Kondo lattice model
• Photodynamic melting of phase-reversed charge stripes and enhanced condensation