Exploiting kinetics and thermodynamics to grow phase-pure complex oxides by molecular-beam epitaxy under continuous codeposition
Exploiting kinetics and thermodynamics to grow phase-pure complex oxides by molecular-beam epitaxy under continuous codeposition
复制标题
利用动力学和热力学在连续共沉积下通过分子束外延生长纯相复合氧化物
DOI：
10.1103/physrevmaterials.1.023403
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发表时间：
2017
影响因子：
3.4
通讯作者：
D. Schlom
中科院分区：
文献类型：
--
作者：
Eva H. Smith;J. Ihlefeld;C. Heikes;H. Paik;Y. Nie;C. Adamo;T. Heeg;Zi;D. Schlom
外延钙钛矿氧化物薄膜和异质结构是一个高活性材料的研究课题，产生了基础和应用的兴趣。这份手稿报告的氧化动力学和薄膜沉积速率的作用相纯复合氧化物的生长，分子束外延，这些材料的首要技术之一，在一个制度，传统上被描述为受热力学。发现薄膜表面的氧化动力学对PbTiO${}_{3}$的生长和建立一个简单的动力学理论来解释实验观察是非常重要的。这些结果对于预测分子束外延生长BiFeO${}_{3}$和其他复合氧化物的条件也具有启发性，对研究氧化物薄膜和异质结构的广泛社区具有高度的兴趣。
Epitaxial perovskite oxide thin films and heterostructures are a highly active materials research topic generating both fundamental and applied interest. This manuscript reports the roles of oxidation kinetics and film deposition rate on the growth of phase-pure complex oxides by molecular-beam epitaxy, one of the premier techniques for these materials, in a regime that is traditionally described as being governed by thermodynamics. It is found that oxidation kinetics on the film surface are surprisingly important for the growth of PbTiO${}_{3}$ and for formulating a simple kinetic theory to interpret experimental observations. The results are also enlightening to predict the conditions for improved growth of BiFeO${}_{3}$ and other complex oxides by MBE, of high interest to the broad community studying oxide films and heterostructures.