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- Title
Pressure-induced monotonic enhancement of T<sub>c</sub> to over 30 K in superconducting Pr<sub>0.82</sub>Sr<sub>0.18</sub>NiO<sub>2</sub> thin films.
- Authors
Wang, N. N.; Yang, M. W.; Yang, Z.; Chen, K. Y.; Zhang, H.; Zhang, Q. H.; Zhu, Z. H.; Uwatoko, Y.; Gu, L.; Dong, X. L.; Sun, J. P.; Jin, K. J.; Cheng, J.-G.
- Abstract
The successful synthesis of superconducting infinite-layer nickelate thin films with the highest Tc ≈ 15 K has ignited great enthusiasm for this material class as potential analogs of the high-Tc cuprates. Pursuing a higher Tc is always an imperative task in studying a new superconducting material system. Here we report high-quality Pr0.82Sr0.18NiO2 thin films with Tconset ≈ 17 K synthesized by carefully tuning the amount of CaH2 in the topotactic chemical reduction and the effect of pressure on its superconducting properties by measuring electrical resistivity under various pressures in a cubic anvil cell apparatus. We find that the onset temperature of the superconductivity, Tconset, can be enhanced monotonically from ~17 K at ambient pressure to ~31 K at 12.1 GPa without showing signatures of saturation upon increasing pressure. This encouraging result indicates that the Tc of infinite-layer nickelates superconductors still has room to go higher and it can be further boosted by applying higher pressures or strain engineering in the heterostructure films. Despite much recent effort, the highest reported Tc of the infinite-layer nickelates remains lower than 15 K. Here, the authors apply pressure to Pr0.82Sr0.18NiO2 thin films and observe a monotonic increase of Tc to 31 K at 12.1 GPa, an increase that does not level off with increasing pressure.
- Subjects
THIN films; CUPRATES; HIGH pressure (Technology); SUPERCONDUCTORS; SUPERCONDUCTING films; ELECTRICAL resistivity; CHEMICAL reduction
- Publication
Nature Communications, 2022, Vol 13, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-022-32065-x