Scientists Crack Key Mystery Behind High-Temperature Superconductors

A Chinese team used ARPES on bilayer nickelate superconducting thin films and found a nodeless gap.

The spectra also showed a dispersion kink, consistent with electron-boson coupling.

Together, the results support an s-wave-like gap symmetry and offer clues to the pairing mechanism.

The findings help address two key open questions in high-temperature nickelate superconductivity.