The article discusses a breakthrough in ambient-pressure superconductivity in bilayer nickelate epitaxial thin films, achieving a transition temperature of 45 K. Utilizing advanced epitaxy methods, three-unit-cell thick La2.85Pr0.15Ni2O7 films were characterized to exhibit unique superconducting properties previously only realizable under high-pressure conditions. The study highlights the importance of achieving this superconductivity without the complications of impurities and extreme conditions, demonstrating potential for more comprehensive investigations into the use of nickelate superconductors in various applications. Additionally, findings imply a BKT-like behavior in magnetism, setting the foundation for future high-temperature superconducting materials research.
The discovery of bilayer nickelate superconductors under high pressure has opened a new chapter in high-transition temperature (high-TC) superconductivity, showing promising results at ambient pressure.
Our findings reveal that three-unit-cell thick La2.85Pr0.15Ni2O7 films exhibit superconductivity onset above the McMillan limit with resistivity measurements indicating TC = 45 K.
The transition to zero resistance in bilayer nickelate thin films shows characteristics of Berezinskii-Kosterlitz-Thouless (BKT)-like behavior, implying innovative pathways for high-TC superconductivity.
Using advanced techniques like GOALL-Epitaxy, we achieve single-crystal growth of nickelates that displays significant anisotropic critical magnetic fields, enhancing our understanding of superconducting materials.
#superconductivity #nickelate-materials #high-temperature-superconductors #epitaxial-growth #material-science
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