Layer-Resolved Impurity States Reveal Competing Pairing Mechanisms in Trilayer Nickelate Superconductor La${}_4$Ni${}_3$O${}_{10}$

Suyin Zheng, Tao Zhou

Trilayer Ruddlesden-Popper nickelate superconductor ${\mathrm{La}}_4{\mathrm{Ni}}_3{\mathrm{O}}_{10}$ has generated considerable interest due to its unconventional superconductivity an…