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Updated: Sep 14, 2025

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Published on: March 24, 2019
Anomalous metallic state underdoped infinite-layer nickelate superconducting thin films
Ting-Na Shao1,2, Chong Sheng1, Xue-Yan Wang2
1Institute of system Engineering, AMS, PLA, Beijing, People's Republic of China.
None:
To date, the nature of the anomalous metallic state in two-dimensional systems remains unclear. In this study, we present the observation of a quantum superconductor-to-metal transition in underdoped Nd0.85Sr0.15NiO2 infinite-layer superconducting thin films, induced by a magnetic field. When a magnetic field perpendicular to the film is applied, we observed a robust intervening anomalous metallic state, characterized by a saturating resistance at low temperatures. The disappearance of Hall resistance and a huge positive magnetoresistance are the other two characteristics of boson abnormal metal state, just like the resistance tends to be saturated at low temperature. The magnetic field-regulated Nd1-xSrxNiO2 infinite-layer thin films can provide a privileged platform for investigating the details of the anomalous metallic state in a controlled manner.
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