Enhanced pairing susceptibility in a photo-doped two-orbital Hubbard model

Abstract

Local spin fluctuations provide the glue for orbital-singlet spin-triplet pairing in the doped Mott insulating regime of multi-orbital Hubbard models. At large Hubbard repulsion $U$, the pairing susceptibility is nevertheless very low, because the pairing interaction cannot overcome the suppression of charge fluctuations. Using nonequilibrium dynamical mean field simulations of the two-orbital Hubbard model, we show that out of equilibrium the pairing susceptibility in this large-$U$ regime can be strongly enhanced by creating a photo-induced population of the relevant charge states, and that this susceptibility correlates with the local spin susceptibility. Since a strong enhancement of the pairing requires a low kinetic energy of the charge carriers, the phenomenon is supported by the ultra-fast cooling of the photo-doped carriers through the creation of local spin excitations.

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Cited by in corpus (24)

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• Multiscale space-time ansatz for correlation functions of quantum systems based on quantics tensor trains
• Comparing the generalized Kadanoff-Baym ansatz with the full Kadanoff-Baym equations for an excitonic insulator out of equilibrium
• Anomalous temperature dependence of high-harmonic generation in Mott insulators
• Entropy-cooled nonequilibrium states of the Hubbard model
• Cooling by photo-doping $--$ Light-induced symmetry breaking in the Hubbard model
• Nonequilibrium steady-state theory of photodoped Mott insulators
• Photo-induced nonequilibrium states in Mott insulators
• Spin, charge and $\eta$-spin separation in one-dimensional photo-doped Mott insulators
• Optical control of competing exchange interactions and coherent spin-charge coupling in two-orbital Mott insulators
• Photoinduced $\eta$ pairing in the Kondo lattice model
• Nonthermal excitonic condensation near a spin-state transition
• Non-thermal superconductivity in photo-doped multi-orbital Hubbard systems
• Quantum many-body scars with unconventional superconducting pairing symmetries via multibody interactions
• Suppression of Heating by Multi-color Driving Protocols in Floquet Engineered Strongly Correlated Systems
• Dynamical control of the conductivity of an atomic Josephson junction
• Pump-probe spectroscopy of the one-dimensional extended Hubbard model at half filling
• Light-induced hidden odd-frequency order in a model for A${}_3$C${}_{60}$
• Third-order strong-coupling impurity solver for real-frequency DMFT: Accurate spectral functions for antiferromagnetic and photo-doped states
• Long-term memory magnetic correlations in the Hubbard model: A dynamical mean-field theory analysis
• Nonequilibrium hysteretic phase transitions in periodically light-driven superconductors
• Radio-frequency driving of an attractive Fermi gas in a one-dimensional optical lattice