Nernst effect and thermopower in an infinite-layer nickelate superconductor*

The diffusion of superconducting vortices generates a Josephson electric field that can be probed in transport experiments (vortex Nernst effect). Famously, large vortex Nernst signals have been recorded in the high-T_c cuprate superconductors at temperatures well above the loss of the Meissner effect (flux expulsion) [1]. The discovery of superconductivity in the infinite-layer nickelates, (A,Sr)NiO₂ (A=La, Pr, Nd) [2], has drawn many comparisons to the cuprates. We discuss careful measurements of the vortex Nernst effect and thermopower in the precursor regime of superconducting Nd_1-xSr_xNiO₂ thin films.

1. Y. Wang, L. Li, and N.P. Ong, Phys. Rev. B 73, 024510 (2006).

2. D. Li, et al., Nature 572, 624 (2019)