Superconducting Nd<sub>1-<i>x</i></sub>Eu<i><sub>x</sub></i>NiO<sub>2</sub> thin films using in situ synthesis.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 37406111.
- Also identified by DOI 10.1126/sciadv.adh3327 and PMC identifier 10321736.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
We report on superconductivity in Nd<sub>1-<i>x</i></sub>Eu<i><sub>x</sub></i>NiO<sub>2</sub> using Eu as a 4f dopant of the parent NdNiO<sub>2</sub> 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 CaH<sub>2</sub> reduction process to induce superconductivity in the infinite-layer nickelates. The Nd<sub>1-<i>x</i></sub>Eu<i><sub>x</sub></i>NiO<sub>2</sub> samples exhibit a step-terrace structure on their surfaces, have a <i>T</i><sub>c</sub> onset of 21 K at <i>x</i> = 0.25, and have a large upper critical field that may be related to Eu 4f doping.