Topotactic reduction of Brownmillerite cobalt oxide

ORAL

Abstract

The soft chemistry topotactic reduction technique has been used for various transition metal oxide compounds to investigate low oxidation states and their resultant physical properties.1 Among recent studies, the discovery of superconducting infinite-layer nickelate thin films highlights the synthetic opportunities provided by topochemistry.2 Here, we adopt this low-temperature reduction method to explore the reduction of brownmillerite cobaltate into a lower oxidation state, using epitaxial thin films.

*Supported by Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, under contract No. DE-AC02-76SF00515.

–

Publication: 1. M. A. Hayward, Semicond. Sci. Technol. 29, 064010 (2014).
2. D. Li et al., Nature 572, 624 (2019).

Presenters

  • Woojin Kim

    • Stanford University
    • Stanford Institute for Materials and Energy Sciences

Authors

  • Woojin Kim

    • Stanford University
    • Stanford Institute for Materials and Energy Sciences

  • Michelle Smeaton

    • Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States

  • Berit H Goodge

    • School of Applied and Engineering Physics, Cornell University, Ithaca, NY 14853, United States.

  • Kyuho Lee

    • Stanford University
    • Stanford University; SLAC National Accelerator Laboratory

  • Motoki Osada

    • Stanford Univ
    • Stanford University; SLAC National Accelerator Laboratory
    • Stanford University

  • Lena F Kourkoutis

    • Cornell University
    • School of Applied and Engineering Physics, Cornell University, Ithaca, NY 14853, United States.

  • Harold Y Hwang

    • Stanford Univ
    • Stanford University; SLAC National Accelerator Laboratory
    • Stanford University