Superconductivity (R = La, Pr, Nd)*

Significant efforts in the materials synthesis and experimental characterization of the infinite-layer nickelate superconductors since the initial report [1] have led to a plethora of spectroscopic, microscopic, and magneto-transport observations [2-5]. One of many questions is the role of the lanthanide element located at the corners of the unit cell (A-site) in these observations: whether it is a minor detail or a critical contributor to the superconducting properties. To shed light on this, by conducting a series of angular anisotropy measurements, we investigate side-by-side the A-site dependence of the magneto-transport properties of the infinite-layer nickelate superconductors, based on the recently found A-site variants [6,7].

 

[1] D. Li et al., Nature 572, 624 (2019).

[2] H. Lu et al., Science 373, 213 (2021).

[3] Y. T. Hsu et al., Preprint at https://arxiv.org/abs/2105.07783 (2021).

[4] B. H. Goodge et al., Proc. Natl Acad. Sci. USA 118, e2007683118 (2021).

[5] S. W. Zeng et al., Phys. Rev. Lett. 125, 147003 (2020).

[6] M. Osada et al., Nano lett. 20, 5735 (2020).

[7] M. Osada et al., Adv. Mater. 2021, 2104083 (2021).