Physical Review X, Journal Year: 2025, Volume and Issue: 15(2)

Published: May 12, 2025

We report evidence for superconductivity with onset temperatures up to 11 K in thin films of the infinite-layer nickelate parent compound NdNiO2. A combination oxide molecular beam epitaxy and atomic hydrogen reduction yields samples high crystallinity low residual resistivities, a substantial fraction which exhibit superconducting transitions. survey large series variety techniques, including electrical transport, scanning transmission electron microscopy, x-ray absorption spectroscopy, resonant inelastic scattering, investigate possible origins superconductivity. propose that could be intrinsic undoped nickelates but suppressed by disorder due possibly sign-changing order parameter, finding would necessitate reconsideration phase diagram. Another hypothesis is materials can hole doped from randomly dispersed apical oxygen atoms, suggest an alternative pathway achieving Published American Physical Society 2025

Language: Английский