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Researchers have confirmed superconductivity in the 1313 phase of La₃Ni₂O₇ nickelates under extreme pressure, revealing that interlayer coupling is critical for achieving high-temperature superconductivity in this material family. This structural comparison between monolayer-trilayer and bilayer phases provides essential insights into the mechanisms driving high-Tc superconductivity within Ruddlesden-Popper nickelates, a key area of study for quantum materials science.

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Quantum nickelate material shows superconductivity under extreme pressure

Quantum ZeitgeistSeptember 18, 20266 min read

Researchers observed superconductivity in the La₃Ni₂O₇ monolayer-trilayer phase, a promising development for understanding nickelate-based high-temperature superconductivity under extreme pressure.

Researchers at Sun Yat-Sen University and the Chinese Academy of Sciences have observed superconductivity in a novel form of lanthanum nickelate, La₃Ni₂O₇, but only when subjected to extreme pressure. Synthesizing a monolayer-trilayer phase of the material, the team found a superconducting transition at 3.6 K above 19 GPa, a stark contrast to the 80 K achieved in the bilayer structure. This difference demonstrates that the temperature at which superconductivity occurs is directly linked to how layers within the material interact, identifying the bilayer NiO₆ block as essential for achieving high-temperature superconductivity in these nickelates. Ruddlesden-Popper Nickelate Superconductivity: Bilayer vs. 1313 Phase The 1313 phase of La₃Ni₂O₇ exhibits a…

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