Non-thermal superconductivity in photo-doped multi-orbital Hubbard systems

Abstract

Superconductivity in laser-excited correlated electron systems has attracted considerable interest due to reports of light-induced superconducting-like states. Here we explore the possibility of non-thermal superconducting order in strongly interacting multi-orbital Hubbard systems, using non-equilibrium dynamical mean field theory. We find that a staggered $\eta$-type superconducting phase can be realized on a bipartite lattice in the high photo-doping regime, if the effective temperature of the photo-carriers is sufficiently low. The $\eta$ superconducting state is stabilized by Hund coupling - a positive Hund coupling favors orbital-singlet spin-triplet $\eta$ pairing, whereas a negative Hund coupling stabilizes spin-singlet orbital-triplet $\eta$ pairing.

References in corpus (13)

• Photovoltaic Hall effect in graphene
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• Photo-induced states in a Mott insulator
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• Generalized Schrieffer-Wolff transformation of multi-flavor Hubbard models
• Twisted chiral superconductivity in photodoped frustrated Mott insulators
• Photo-induced Dirac cone flattening in BaNiS${}_2$

Cited by in corpus (11)

• Photo-induced nonequilibrium states in Mott insulators
• Strong coupling impurity solver based on quantics tensor cross interpolation
• Quantum many-body scars with unconventional superconducting pairing symmetries via multibody interactions
• Photo-induced Ferromagnetic and Superconducting Orders in Multi-orbital Hubbard Models
• 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
• Electronic modes induced by spin and charge perturbations in Mott and Kondo insulators
• Nonequilibrium hysteretic phase transitions in periodically light-driven superconductors
• Photoinduced excitonic magnetism in a multiorbital Hubbard system
• Radiative Higgs mode in photoinduced $\eta$ pairs