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Superconducting Nd_1-xEu_xNiO₂ thin films using in situ synthesis.

ABSTRACT: We report on superconductivity in Nd_1-xEu_xNiO₂ using Eu as a 4f dopant of the parent NdNiO₂ infinite-layer compound. We use an all-in situ molecular beam epitaxy reduction process to achieve the superconducting phase, providing an alternate method to the ex situ CaH₂ reduction process to induce superconductivity in the infinite-layer nickelates. The Nd_1-xEu_xNiO₂ samples exhibit a step-terrace structure on their surfaces, have a T_c onset of 21 K at x = 0.25, and have a large upper critical field that may be related to Eu 4f doping.

SUBMITTER: Wei W

PROVIDER: S-EPMC10321736 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature

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Superconducting Nd1-xEuxNiO2 thin films using in situ synthesis.

Wei Wenzheng W Vu Dung D Zhang Zhan Z Walker Frederick J FJ Ahn Charles H CH

Science advances 20230705 27

We report on superconductivity in Nd1-xEuxNiO2 using Eu as a 4f dopant of the parent NdNiO2 infinite-layer compound. We use an all-in situ molecular beam epitaxy reduction process to achieve the superconducting phase, providing an alternate method to the ex situ CaH2 reduction process to induce superconductivity in the infinite-layer nickelates. The Nd1-xEuxNiO2 samples exhibit a s ...[more]

PMID: 37406111

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