Photo-induced Ferromagnetic and Superconducting Orders in Multi-orbital Hubbard Models

Abstract

The search for hidden orders in photoexcited lattice systems is an active research field driven by experimental reports of light-induced or light-stabilized phases. In this study, we investigate hidden electronic orders in strongly correlated two-orbital Hubbard models with orbital-dependent bandwidths. In equilibrium, the half-filled systems are antiferromagnetically ordered. Using non-equilibrium dynamical mean field theory we demonstrate the appearance of nonthermal ferromagnetic order in the photo-doped state, if the two bandwidths are sufficiently different, and its coexistence with spin-singlet $\eta$-superconductivity in the high photo-doping region. Spin-triplet $\eta$-superconducting order appears instead if the two bandwidths are comparable. The rich nonequilibrium phasediagram uncovered in this work shows that Mott insulating multi-orbital systems provide an interesting platform for the realization of nonthermal electronic orders.

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• Photoinduced charge and spin dynamics in strongly correlated electron systems
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• Generalized Schrieffer-Wolff transformation of multi-flavor Hubbard models
• Non-thermal superconductivity in photo-doped multi-orbital Hubbard systems
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Cited by in corpus (9)

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• Role of phonon coupling in driving photo-excited Mott insulators towards a transient superconducting steady state
• Photo-induced charge, spin, and orbital order in the two-orbital extended Hubbard model
• Third-order strong-coupling impurity solver for real-frequency DMFT: Accurate spectral functions for antiferromagnetic and photo-doped states
• Magnon damping and mode softening in quantum double-exchange ferromagnets
• Photoinduced excitonic magnetism in a multiorbital Hubbard system
• Nonequilibrium hysteretic phase transitions in periodically light-driven superconductors