Nanometer-Thick Sr2IrO4Freestanding Films for Flexible Electronics

Sujan Shrestha, Matthew Coile, Menglin Zhu, Maryam Souri, Jiwoong Kim, Rina Pandey, Joseph W. Brill, Jinwoo Hwang, Jong Woo Kim, Ambrose Seo

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


We report the structural and optical properties of nanoscale Sr2IrO4 freestanding thin films fabricated using a water-soluble Sr3Al2O6 layer. The coherent lattice structure, phonon modes, two-magnon Raman scattering, and optical absorption spectra of the Sr2IrO4 nanomembrane are analogous to those of the layered iridate epitaxial thin films and single crystals. Remarkably, the formation of 3-unit-cell-thick SrIrO3 and interfacial composite layers alleviates the antiphase boundaries at the Sr2IrO4/Sr3Al2O6 interface, resulting in structurally robust nanomembranes. Our experimental results show that this freestanding thin-film approach of layered oxides can provide techniques for tuning or realizing unprecedented states beyond conventional thin-film methods, suggesting a pathway in achieving flexible layered-oxide electronics.

Original languageEnglish
Pages (from-to)6310-6315
Number of pages6
JournalACS Applied Nano Materials
Issue number7
StatePublished - Jul 24 2020

Bibliographical note

Publisher Copyright:
Copyright © 2020 American Chemical Society.


  • STEM
  • SrIrO
  • freestanding thin films
  • interface
  • layered oxides
  • strain

ASJC Scopus subject areas

  • General Materials Science


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