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arXiv · 2609.25328

Nanoscale Sr$_2$IrO$_4$ Freestanding Thin-Films for Flexible Electronics

Sujan Shrestha·Matthew Coile·Menglin Zhu·Maryam Souri·Jiwoong Kim·Rina Pandey·Joseph Brill·Jinwoo Hwang·Jong-Woo Kim·Ambrose Seo
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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 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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Sujan Shrestha, Matthew Coile, Menglin Zhu, Maryam Souri, Jiwoong Kim, Rina Pandey, Joseph Brill, Jinwoo Hwang, Jong-Woo Kim, Ambrose Seo. 2026-09-21. Nanoscale Sr$_2$IrO$_4$ Freestanding Thin-Films for Flexible Electronics. https://doi.org/10.1021/acsanm.0c01351

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