Transport Characterization of Infinite Layer Nickelate Superconductor*

The recently discovered infinite layer nickelate superconductor presents a potential new family of unconventional superconductors [1]. While sharing similar crystal structure with infinite layer cuprates, the electronic properties can be non-trivially distinct due to the relatively extreme valence state of Ni1+. DFT calculations have also pointed out potential involvement of multiple bands [2]. In this sense, a careful comparison against the cuprate system is imperative in obtaining a proper and unbiased view of the nickelate superconductivity. Furthermore, detailed characterization of the difference between the two systems may provide new insights into the ingredients of superconductivity in layered oxide systems. As a step in this direction, we investigate and report the magnetotransport properties of nickelates in both the normal and superconducting state.

[1] Li, D. et al. Superconductivity in an infinite-layer nickelate. Nature 572, 624–627 (2019).
[2] Lee, K.-W. & Pickett, W. E. Infinite-layer LaNiO2: Ni1+ is not Cu2+. Phys. Rev. B 70, 165109 (2004).