Spin fluctuations sufficient to mediate superconductivity in nickelates

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$\hat{I}“$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$\hat{I}“$A, that spin-fluctuations are the mediator of the superconductivity observed in nickelates.

13 pages, 8 figures