Synthesis and electronic properties of Ndn+1Nin O3n+1 Ruddlesden-Popper nickelate thin films

Grace A. Pan, Qi Song, Dan Ferenc Segedin, Myung Chul Jung, Hesham El-Sherif, Erin E. Fleck, Berit H. Goodge, Spencer Doyle, Denisse Córdova Carrizales, Alpha T. N'Diaye, Padraic Shafer, Hanjong Paik, Lena F. Kourkoutis, Ismail El Baggari, Antia S. Botana, Charles M. Brooks, Julia A. Mundy

Research output: Contribution to journalArticlepeer-review

Abstract

The rare-earth nickelates possess a diverse set of collective phenomena including metal-to-insulator transitions, magnetic phase transitions, and upon chemical reduction, superconductivity. Here, we demonstrate epitaxial stabilization of layered nickelates in the Ruddlesden-Popper form Ndn+1NinO3n+1 using molecular beam epitaxy. By optimizing the stoichiometry of the parent perovskite NdNiO3, we can reproducibly synthesize the n=1-5 member compounds. X-ray absorption spectroscopy at the O K and Ni L edges indicate systematic changes in both the nickel-oxygen hybridization level and nominal nickel filling from 3d8 to 3d7 as we move across the series from n=1 to ∞. The n=3-5 compounds exhibit weakly hysteretic metal-to-insulator transitions with transition temperatures that depress with increasing order toward NdNiO3 (n=∞).

Original languageEnglish (US)
Article number055003
JournalPhysical Review Materials
Volume6
Issue number5
DOIs
StatePublished - May 2022
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)

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