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The recent discovery of superconductivity in infinite-layer nickelatesgenerates tremendous research endeavors, but the ground state of their parentcompounds is still under debate. Here, we report experimental evidences for thedominant role of Kondo scattering in the underdoped Nd1-xSrxNiO2 thin films. Aresistivity minimum associated with logarithmic temperature dependence in bothlongitudinal and Hall resistivities are observed in the underdoped Nd1-xSrxNiO2samples before the superconducting transition. A linear scaling behavior$\sigma_{xy}^{AHE}\sim\sigma_{xx}$ between anomalous Hall conductivity$\sigma_{xy}^{AHE}$ and conductivity $\sigma_{xx}$ is revealed, verifying thedominant Kondo scattering at low temperature. The effect of weak(anti-)localization is found to be secondary. Our experiments can helpclarifying the basic physics in the underdoped Nd1-xSrxNiO2 infinite-layer thinfilms.

Kondo scattering in underdoped Nd1-xSrxNiO2 infinite-layer superconducting thin films