Scanning tunneling microscopy on Sn/Si(110) system
Scanning tunneling microscopy on Sn/Si(110) system
复制标题
Sn/Si(110) 系统上的扫描隧道显微镜
DOI：
10.1016/s0169-4332(98)00036-1
复制
发表时间：
1998
影响因子：
6.7
通讯作者：
K. Ueda
中科院分区：
文献类型：
--
作者：
T. An;M. Yoshimura;K. Ueda
采用扫描隧道显微镜（STM）研究了Sn/Si（110）体系的表面超结构。除了之前报道的三个上层建筑（4,3）×（2 ā，2）、（3,0）×（1 ā，3）和（3,3）×（2 ā，1）外，在这些阶段之间的转换过程中，还可以清楚地观察到（2,0）×（1 ā，4）等新型上层建筑。发现（4,3）×（2′，2）和（3,0）×（1′，3）由Sn三聚体组成，分别在表面呈二维和一维排列。后者的上层结构含有额外的单体锡原子。（3,3）×（2’，1）的图像由包含四个或更多的锡原子二维排列的团簇突起组成。（2,0）×（1′，4）上部结构由沿[1′10]方向排列的锡二聚体组成。基于本研究提出的结构模型，讨论了两个阶段之间的过渡过程。
Surface superstructures on Sn/Si(110) system were investigated by scanning tunneling microscopy (STM). In addition to three superstructures reported previously, (4,3)×(2̄,2), (3,0)×(1̄,3) and (3,3)×(2̄,1), new types of superstructures such as (2,0)×(1̄,4) were clearly observed during transformation processes between these phases. It was found that the (4,3)×(2̄,2) and (3,0)×(1̄,3) consist of Sn trimers which arrange two- and one-dimensionally on the surface, respectively. The latter superstructure contains extra Sn atoms as monomers. The image of (3,3)×(2̄,1) consists of cluster protrusions that contain four or more Sn atoms arranged two-dimensionally. It was also found that the (2,0)×(1̄,4) superstructure consists of Sn dimer rows along the [1̄10] direction. Transition processes between the phases is discussed, based on the structural models proposed in the present study.