Doping evolution of the Mott-Hubbard landscape in infinite-layer nickelates

Berit H. Goodge, Danfeng Li, Kyuho Lee, Motoki Osada, Bai Yang Wang, George A. Sawatzky, Harold Y. Hwang, Lena F. Kourkoutis

Research output: Contribution to journalArticlepeer-review

72 Citations (Scopus)


The recent observation of superconductivity in Nd08Sr02NiO2 has raised fundamental questions about the hierarchy of the underlying electronic structure. Calculations suggest that this system falls in the Mott-Hubbard regime, rather than the charge-transfer configuration of other nickel oxides and the superconducting cuprates. Here, we use state-of-the-art, locally resolved electron energy-loss spectroscopy to directly probe the Mott-Hubbard character of Nd1xSrxNiO2. Upon doping, we observe emergent hybridization reminiscent of the Zhang-Rice singlet via the oxygen-projected states, modification of the Nd 5d states, and the systematic evolution of Ni 3d hybridization and filling. These experimental data provide direct evidence for the multiband electronic structure of the superconducting infinite-layer nickelates, particularly via the effects of hole doping on not only the oxygen but also nickel and rare-earth bands.

Original languageEnglish
Article numbere2007683118
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number2
Publication statusPublished - 2021 Jan 12
Externally publishedYes


  • Electron energy-loss spectroscopy
  • Hole doping
  • Infinite-layer nickelates
  • Mott-Hubbard regime
  • Superconductivity

ASJC Scopus subject areas

  • General


Dive into the research topics of 'Doping evolution of the Mott-Hubbard landscape in infinite-layer nickelates'. Together they form a unique fingerprint.

Cite this