Large tuning of the optical properties of nanoscale NdNiO₃ via electron doping.

ABSTRACT: We synthesized crystalline films of neodymium nickel oxide (NdNiO₃), a perovskite quantum material, switched the films from a metal phase (intrinsic) into an insulator phase (electron-doped) by field-driven lithium-ion intercalation, and characterized their structural and optical properties. Time-of-flight secondary-ion mass spectrometry (ToF-SIMS) showed that the intercalation process resulted in a gradient of the dopant concentration along the thickness direction of the films, turning the films into insulator-metal bilayers. We used variable-angle spectroscopic ellipsometry to measure the complex refractive indices of the metallic and insulating phases of NdNiO₃. The insulator phase has a refractive index of n ∼ 2 and low absorption in the visible and near-in

SUBMITTER: Jin Y 

PROVIDER: S-EPMC12617736 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature