发表机构
Cornell University; Ohio State University（康奈尔大学; 俄亥俄州立大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文通过分子束外延首次合成单晶AgTaO3薄膜，在SrTiO3衬底上实现高质量外延生长，为银基钽酸盐的应变工程和界面性质研究提供平台。
AI 中文摘要
我们报道了利用分子束外延（MBE）首次合成单晶AgTaO3薄膜。在臭氧/氧气气氛（80% O3 + 20% O2）下，通过顺序沉积原子银和TaO2层，在(001)和(111)取向的SrTiO3衬底上生长了高质量的外延AgTaO3薄膜。X射线衍射和倒易空间映射表明，薄膜与SrTiO3衬底相干应变，其摇摆曲线锐利度与衬底相当，表明结构完整性高。高角环形暗场扫描透射电子显微镜（HAADF-STEM）证实了(001)pc取向薄膜的相干、低缺陷生长。对于(111)pc取向薄膜，初始相干生长可持续至10 nm，之后过渡为富Ta表面区域。能量色散X射线光谱（EDX）显示，两种取向在衬底界面处均存在窄的阳离子互混区域。这项工作展示了单晶AgTaO3薄膜的有效合成路线，为研究银基钽酸盐中的应变工程和新兴界面性质提供了平台。
英文摘要
We report the first synthesis of single-crystal AgTaO3 thin films using molecular-beam epitaxy (MBE). High-quality epitaxial AgTaO3 films were grown on both (001)- and (111)-oriented SrTiO3 substrates using sequential deposition of atomic silver and TaO2 layers under an ozone/oxygen atmosphere (80 % O3 + 20 % O2). X-ray diffrac- tion and reciprocal space mapping demonstrate that the films are coherently strained to the SrTiO3 substrates with sharp rocking curves comparable to the substrates, indicating high structural perfection. High-angle annular dark-field scanning trans- mission electron microscopy (HAADF-STEM) confirms coherent, low defect growth for (001)pc-oriented films. For (111)pc-oriented films, initial coherent growth proceeds up to 10 nm before transitioning into a Ta-rich surface region. Energy-dispersive X-ray spectroscopy (EDX) reveals a narrow cation intermixing region at the sub- strate interface for both orientations. This work demonstrates an effective synthesis route for single-crystal AgTaO3 thin films, providing a platform to investigate strain engineering and emergent interfacial properties in silver-based tantalates.
