Zandbergen Henny W, Pao Chun-Wei, Srolovitz David J
National Centre for HREM, Kavli Centre of Nanoscience, Delft University of Technology, 2628 CJ Delft, The Netherlands.
Phys Rev Lett. 2007 Jan 19;98(3):036103. doi: 10.1103/PhysRevLett.98.036103. Epub 2007 Jan 18.
High-resolution electron microscopy investigations of Au films show that adatoms on (100) surfaces insert into the underlying terrace to form surface dislocations. This injection readily occurs when the number of adatoms on a terrace is approximately 20 atoms or less. The surface dislocation glides along the terrace, but is repelled from the edges. The dislocation escapes by squeezing out in the dislocation line direction (not gliding out the terrace edge). Atomistic simulations confirm the dislocation stability, easy glide along the terrace and trapping at the terrace edge. These results have profound implications for film growth.
对金膜的高分辨率电子显微镜研究表明，（100）表面上的吸附原子会插入下面的平台以形成表面位错。当平台上的吸附原子数量约为20个或更少时，这种注入很容易发生。表面位错沿着平台滑动，但会被边缘排斥。位错通过在位错线方向挤出（而不是滑出平台边缘）而逃逸。原子模拟证实了位错的稳定性、沿平台的容易滑动以及在平台边缘的捕获。这些结果对薄膜生长具有深远的影响。
