Superconducting Dome and Electronic Structure of the Nickelate Superconductors*

The discovery of superconductivity in cuprates decades ago had stirred enduring interest in searching for analogous materials systems. In this talk, we present our observation of superconductivity in an infinite-layer nickelate thin film synthesized by a soft-chemistry approach¹, and the study of its superconducting phase diagram². This system is of particular interest due to its potential relationship with the high-T_c cuprate superconductors, in that they share a similar crystal structure and starting electronic configuration. We also highlight the key aspects of its electronic structure³, which turn out to be inherently distinct from cuprates, including the unusual role of Nd bands.

References:
[1] D. F. Li, K. Lee, B. Y. Wang, M. Osada, S. Crossley, H. R. Lee, Y. Cui, Y. Hikita, and H. Y. Hwang, Nature 572, 624-627 (2019).
[2] D. F. Li, B. Y. Wang, K. Lee, S. P. Harvey, M. Osada, B. H. Goodge, L. F. Kourkoutis, and H. Y. Hwang, Phys. Rev. Lett. 125, 027001 (2020).
[3] M. Hepting et al., Nat. Mater. 19, 381-385 (2020).