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DOE OSTI · 1756675

Nanometer-Thick Sr 2 IrO 4 Freestanding Films for Flexible Electronics

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

In this article, we report the structural and optical properties of nanoscale Sr 2 IrO 4 freestanding thin-films fabricated using a water-soluble Sr 3 Al 2 O 6 layer. The coherent lattice structure, phonon modes, two-magnon Raman scattering, and optical absorption spectra of the Sr 2 IrO 4 nanomembrane are analogous to those of the layered iridate epitaxial thin-films and single crystals. Remarkably, the formation of 3-unit-cell-thick SrIrO 3 and interfacial composite layers alleviates the antiphase boundaries at the Sr 2 IrO 4 /Sr 3 Al 2 O 6 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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36 MATERIALS SCIENCEIridatesSTEMfreestanding filminterfaceleyered oxidestrain

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Shrestha, Sujan, Coile, Matthew, Zhu, Menglin, Souri, Maryam, Kim, Jiwoong, Pandey, Rina, Brill, Joseph W., Hwang, Jinwoo, Kim, Jong-Woo, Seo, Ambrose. 2020-07-02. Nanometer-Thick Sr 2 IrO 4 Freestanding Films for Flexible Electronics. https://doi.org/10.1021/acsanm.0c01351

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