发表机构
Department of Physics and Astronomy, University of Kentucky; Department of Materials Science and Engineering, The Ohio State University; Department of Physics, Pusan National University; Advanced Photon Source, Argonne National Laboratory（肯塔基大学物理与天文学系; 俄亥俄州立大学材料科学与工程系; 釜山国立大学物理系; 阿贡国家实验室先进光子源）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过水溶性牺牲层制备纳米Sr2IrO4自支撑薄膜，其结构与光学性质保持优异，为柔性层状氧化物电子器件提供了新途径。
AI 中文摘要
我们报道了利用水溶性Sr3Al2O6层制备的纳米尺度Sr2IrO4自支撑薄膜的结构和光学性质。Sr2IrO4纳米膜的相干晶格结构、声子模式、双磁振子拉曼散射和光学吸收光谱与层状铱酸盐外延薄膜和单晶的相应性质类似。值得注意的是，3个单胞厚的SrIrO3和界面复合层的形成缓解了Sr2IrO4/Sr3Al2O6界面处的反相边界，从而产生了结构稳健的纳米膜。我们的实验结果表明，这种层状氧化物的自支撑薄膜方法可以提供超越传统薄膜方法的调控或实现前所未有状态的技术，为实现柔性层状氧化物电子学提供了途径。
英文摘要
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.
Comments10 pages, 4 figures
Journal refACS Applied Nano Materials 3, 6310 (2020)
