High field magneto-transport properties of superconducting Nd1-xEuxNiO2 thin films

ORAL

Abstract

The infinite-layer-nickelates (A,B)NiO2 (A=La, Pr, Nd; B=Sr, Ca, Eu) are novel superconductors with similarities to unconventional superconductors, such as the cuprate superconductors. Recent studies show that superconductivity in the La-based infinite-layer nickelates La1-x(Ca/Sr)xNiO2 persists in a magnetic field in both in-plane and out-of-plane directions, exceeding the Pauli limit.1,2 We study magneto-transport properties of nickelate superconductor Nd1-xEuxNiO2 with x=0.25 synthesized using Al reduction technique.3 The Nd1-xEuxNiO2 thin films have Tc as high as 21K at optimal doping x=0.25. The upper critical magnetic field Hc2 is well above 35T for both in-plane and out-of-plane applied magnetic fields. We discuss the temperature dependence of Hc2 and compare it with that of other infinite-layer-nickelates.



[1] Chow, L. E. et al. arXiv:2204.12606 (2022).

[2] Sun, W. et al. Advanced Materials 2303400 (2023).

[3] Wei, W., Vu, D., et al. Sci Adv 9, 27 (2023).

* This work was supported by U.S. Department of Energy, under award number DE-SC0019211.A portion of this work was performed at the National High Magnetic Field Laboratory, which is supported by NSF Cooperative Agreement No. DMR-2128556 and the State of Florida.

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Presenters

  • Dung D Vu

    Yale University

Authors

  • Dung D Vu

    Yale University

  • Wenzheng Wei

    Yale University

  • Frederick J Walker

    Yale University

  • Charles H Ahn

    Yale University