Robinson I K, Bennett P A, Himpsel F J
Department of Physics, University of Illinois, Urbana, IL 61801, USA.
Phys Rev Lett. 2002 Mar 4;88(9):096104. doi: 10.1103/PhysRevLett.88.096104. Epub 2002 Feb 15.
The structure of the Au/Si(557) surface is determined from three-dimensional x-ray diffraction measurements, which directly mandate a single Au atom per unit cell. We use a "heavy atom" method in which the Au atom images the rest of the structure. Au is found to substitute for a row of first-layer Si atoms in the middle of the terrace, which then reconstructs by step rebonding and adatoms. The structure is consistent with the 1D metallic behavior seen by photoemission.
通过三维X射线衍射测量确定了Au/Si(557)表面的结构，这直接表明每个晶胞中有一个金原子。我们采用“重原子”方法，其中金原子描绘了结构的其余部分。发现金取代了平台中间一排第一层硅原子，然后通过台阶再结合和吸附原子进行重构。该结构与光电子能谱观察到的一维金属行为一致。
