Ion Scattering Studies of Reconstruction and Growth

这项研究的总体目标是确定曲面的几何结构，特别是重建曲面。这项工作提供了对影响界面原子位置的因素的更深层次和更广泛的理解，并利用这些知识来人工制造具有有趣和潜在有用性质的表面。将解决的一些问题包括：1)外部扰动，如不同电负性的台阶和原子，对重建现象的影响；2)导致影响双层生长的微观因素？关于表面的振动性质，可以获得哪些新的见解？采用的主要实验技术是中能离子散射。

The general goals of this research are to determine the geometric structure of surfaces, in particular reconstructed surfaces. This work provides a deeper and wider understanding of the factors that affect atomic positions at interfaces and to use this knowledge to artificially produce surfaces with interesting and potentially useful properties. Some of the issues that will be addressed include: 1) the influence of external perturbations, like steps and adatoms of different electronegativity, on reconstruction phenomena; 2) what are the microscopic factors that cause influence bilayer growth?; what new insights can be obtained about the vibrational properties at a surface? The principal experimental technique to be employed is medium energy ion scattering.