Above the McMillan Limit: Ambient-Pressure Nickel-Based High-Temperature Superconductor Achieved

A team of engineers and physicists from Southern University of Science and Technology in China has synthesized a novel nickel-based material exhibiting superconductivity above -233°C (40K) under ambient pressure, surpassing the McMillan limit. They achieved this by synthesizing bilayer nickelate thin films (La₂.₈₅Pr₀.₁₅Ni₂O₇), with one demonstrating high-temperature superconducting properties. This breakthrough promises to revolutionize technologies in maglev trains, fusion reactors, and MRI machines, and advance our understanding of superconductivity.