Penetration depth measurements of infinite-layer nickelates*

The discovery of superconductivity in infinite-layer nickelates [1] has the potential to help reveal the origins of high-temperature superconductivity. To do this, we must first develop an understanding of superconductivity in nickelates by measuring their fundamental properties. In this talk, I will present our measurements of the in-plane penetration depth of (Nd,Sr)NiO₂ thin films across the doping-dependent superconducting dome [2]. The penetration depth provides information about the superfluid density and pairing symmetry of the superconducting state, both of which will be important in improving our understanding of the nature of superconductivity in these materials.

[1] Li, D. et al. Superconductivity in an infinite-layer nickelate. Nature 572, 624–627 (2019).

[2] Li, D. et al. Superconducting Dome in Nd_1-xSr_xNiO₂ Infinite Layer Films. Phys. Rev. Lett. 125, 027001 (2020).