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Spin fluctuations sufficient to mediate superconductivity in nickelates

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arxiv 2312.08260 v1 pith:CYURTDO3 submitted 2023-12-13 cond-mat.supr-con

classification cond-mat.supr-con
keywords nickelatessuperconductivityfluctuationsgammaspinadvancedagreementagrees
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abstract

Infinite-layer nickelates show high-temperature superconductivity, and the experimental phase diagram agrees well with the one simulated within the dynamical vertex approximation (D$\Gamma$A). Here, we compare the spin-fluctuation spectrum behind these calculations to resonant inelastic X-ray scattering experiments. The overall agreement is good. This independent cross-validation of the strength of spin fluctuations strongly supports the scenario, advanced by D$\Gamma$A, that spin-fluctuations are the mediator of the superconductivity observed in nickelates.

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