A Superconducting Praseodymium Nickelate with Infinite Layer Structure.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 32574061.
- Also identified by DOI 10.1021/acs.nanolett.0c01392.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
A variety of nickel oxide compounds have long been studied for their manifestation of various correlated electron phenomena. Recently, superconductivity was observed in nanoscale infinite layer nickelate thin films of Nd<sub>0.8</sub>Sr<sub>0.2</sub>NiO<sub>2</sub>, epitaxially stabilized on SrTiO<sub>3</sub> substrates via topotactic reduction from the perovskite precursor phase. Here, we present the synthesis and properties of PrNiO<sub>2</sub> thin films on SrTiO<sub>3</sub>. Upon doping in Pr<sub>0.8</sub>Sr<sub>0.2</sub>NiO<sub>2</sub>, we observe superconductivity with a transition temperature of 7-12 K and robust critical current density at 2 K of 334 kA/cm<sup>2</sup>. These findings indicate that superconductivity in the infinite layer nickelates is relatively insensitive to the details of the rare earth 4<i>f</i> configuration. Furthermore, they motivate the exploration of a broader family of compounds based on two-dimensional NiO<sub>2</sub> planes, which will enable systematic investigation of the superconducting and normal state properties and their underlying mechanisms.