Superconducting Nd1-xEuxNiO2 thin films using in situ synthesis

Wei, Wenzheng; Vu, Dung; Zhang, Zhan; Walker, Frederick J.; Ahn, Charles H.

doi:10.1126/sciadv.adh3327

Superconducting Nd_1-xEu_xNiO₂ thin films using in situ synthesis

Journal Article · Wed Jul 05 00:00:00 EDT 2023 · Science Advances

DOI:https://doi.org/10.1126/sciadv.adh3327· OSTI ID:1997937

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Yale Univ., New Haven, CT (United States)
Argonne National Laboratory (ANL), Argonne, IL (United States)

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.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)

Grant/Contract Number:: AC02-06CH11357; SC0019211

OSTI ID:: 1997937

Journal Information:: Science Advances, Journal Name: Science Advances Journal Issue: 27 Vol. 9; ISSN 2375-2548

Publisher:: AAASCopyright Statement

Country of Publication:: United States

Language:: English

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