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

doi:10.1021/acsanm.0c01351

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 journal › Article › peer-review

7 Scopus citations

Abstract

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 language	English
Pages (from-to)	6310-6315
Number of pages	6
Journal	ACS Applied Nano Materials
Volume	3
Issue number	7
DOIs	https://doi.org/10.1021/acsanm.0c01351
State	Published - Jul 24 2020

Bibliographical note

Funding Information:
We acknowledge the support of a National Science Foundation (NSF) Grant No. DMR-1454200 for thin-film synthesis and characterization. M.Z. and J.H. acknowledge support by NSF, under Grant No. DMR-1847964. Electron microscopy was performed at the Center for Electron Microscopy and Analysis at The Ohio State University. This research used resources of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. A.S. acknowledges the support from the Alexander von Humboldt Foundation (Research Fellowship for Experienced Researchers) for Raman spectroscopy experiments.

Publisher Copyright:
Copyright © 2020 American Chemical Society.

Keywords

STEM
SrIrO
freestanding thin films
interface
layered oxides
strain

ASJC Scopus subject areas

Materials Science (all)

Access to Document

10.1021/acsanm.0c01351

Cite this

@article{e541484b31c2437f8743dcc2ce1b3df2,

title = "Nanometer-Thick Sr2IrO4Freestanding Films for Flexible Electronics",

abstract = "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.",

keywords = "STEM, SrIrO, freestanding thin films, interface, layered oxides, strain",

author = "Sujan Shrestha and Matthew Coile and Menglin Zhu and Maryam Souri and Jiwoong Kim and Rina Pandey and Brill, {Joseph W.} and Jinwoo Hwang and Kim, {Jong Woo} and Ambrose Seo",

note = "Funding Information: We acknowledge the support of a National Science Foundation (NSF) Grant No. DMR-1454200 for thin-film synthesis and characterization. M.Z. and J.H. acknowledge support by NSF, under Grant No. DMR-1847964. Electron microscopy was performed at the Center for Electron Microscopy and Analysis at The Ohio State University. This research used resources of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. A.S. acknowledges the support from the Alexander von Humboldt Foundation (Research Fellowship for Experienced Researchers) for Raman spectroscopy experiments. Publisher Copyright: Copyright {\textcopyright} 2020 American Chemical Society.",

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AU - Shrestha, Sujan

AU - Coile, Matthew

AU - Zhu, Menglin

AU - Souri, Maryam

AU - Kim, Jiwoong

AU - Pandey, Rina

AU - Brill, Joseph W.

AU - Hwang, Jinwoo

AU - Kim, Jong Woo

AU - Seo, Ambrose

N1 - Funding Information: We acknowledge the support of a National Science Foundation (NSF) Grant No. DMR-1454200 for thin-film synthesis and characterization. M.Z. and J.H. acknowledge support by NSF, under Grant No. DMR-1847964. Electron microscopy was performed at the Center for Electron Microscopy and Analysis at The Ohio State University. This research used resources of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. A.S. acknowledges the support from the Alexander von Humboldt Foundation (Research Fellowship for Experienced Researchers) for Raman spectroscopy experiments. Publisher Copyright: Copyright © 2020 American Chemical Society.

PY - 2020/7/24

Y1 - 2020/7/24

N2 - 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.

AB - 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.

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