Twisted chiral superconductivity in photodoped frustrated Mott insulators

Abstract

Recent advances in ultrafast pump-probe spectroscopy provide access to hidden phases of correlated matter, including light-induced superconducting states, but the theoretical understanding of these nonequilibrium phases remains limited. Here we report how a new type of chiral superconducting phase can be stabilized in photodoped frustrated Mott insulators. The metastable phase features a spatially varying order parameter with a $120^{\circ }$ phase twist which breaks both time-reversal and inversion symmetry. Under an external electric pulse, the $120^{\circ }$ chiral superconducting state can exhibit a second-order supercurrent perpendicular to the field in addition to a first-order parallel response, similar to a nonlinear anomalous Hall effect. This phase can be tuned by artificial gauge fields when the system is dressed by high-frequency periodic driving. The mechanism revealed in this study applies to Mott insulators on various frustrated lattices and the hidden superconducting phase can be realized in both cold-atom quantum simulators and correlated solids.

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Cited by in corpus (9)

• Photo-induced nonequilibrium states in Mott insulators
• Non-thermal superconductivity in photo-doped multi-orbital Hubbard systems
• Photo-induced Ferromagnetic and Superconducting Orders in Multi-orbital Hubbard Models
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