Study of Fe deposition onto root 3 x root 3-Al/Si(111) template by scanning tunneling microscopy
文献类型：期刊论文
| 作者 | Xi, L ; Ma, LY ; He, K ; Wang, ZT ; Xue, QK ; Xiao, XD ; Lau, WM |
| 刊名 | SURFACE SCIENCE
 |
| 出版日期 | 2006 |
| 卷号 | 600期号:15页码:3072 |
| 关键词 | IRON SILICIDE FILMS ELECTRONIC-PROPERTIES FESI1+X FILMS SI(111) AL GROWTH SURFACE SPECTROSCOPY TEMPERATURE BETA-FESI2 |
| ISSN号 | 0039-6028 |
| 通讯作者 | Lau, WM (reprint author), Univ Western Ontario, Western Sci Ctr, Room G-1, London, ON N6A 5B7, Canada. |
| 中文摘要 | The surface dynamics of Fe deposited onto the template surface of root 3 x root 3-Al adatom-layer on Si(1 1 1) has been studied using scanning tunneling microscopy (STM). By imaging at both positive and negative sample bias, we identify the locations of Fe, Al and Si atoms by the susceptibility differences of these sites in receiving electrons and holes from the STM tip. When 0.1 ML of Fe atoms are deposited at room temperature, some Fe atoms incorporate themselves into the adlayer as dispersed atoms or small Fe clusters with 2-10 atoms. A smaller amount of Fe atoms choose to sit on the adlayer, once again as dispersed atoms or small Fe clusters. As the Fe coverage increases beyond 0.1 ML, both Fe clusters in and on the adlayer grow into 3-dimensional islands. Raising the growth temperature to 100 degrees C is enough to enhance the diffusivity of Fe atoms and initiate a small degree of cluster coalescence. However, these clusters still do not show any crystallinity by STM observation until they are annealed. Deposition of Fe atoms at 400 degrees C or post-deposition annealing above this temperature leads to the formation of iron silicide islands with a 2 x 2 surface lattice and a CsCl-type iron silicide structure, which are surrounded by root 3 x root 3-Al/Si(1 1 1) adlayer domains with a depletion of Si atoms near the silicide islands. Most of these islands have a triangular shape, and grow preferentially along the step edges of the Si(1 1 1) surface. The root 3 x root 3-Al adlayer appears to passivate the Si surface and enhances the diffusivity of Fe atoms but the passivation is not thermally stable. (c) 2006 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/53743]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Xi, L,Ma, LY,He, K,et al. Study of Fe deposition onto root 3 x root 3-Al/Si(111) template by scanning tunneling microscopy[J]. SURFACE SCIENCE,2006,600(15):3072. |
| APA | Xi, L.,Ma, LY.,He, K.,Wang, ZT.,Xue, QK.,...&Lau, WM.(2006).Study of Fe deposition onto root 3 x root 3-Al/Si(111) template by scanning tunneling microscopy.SURFACE SCIENCE,600(15),3072. |
| MLA | Xi, L,et al."Study of Fe deposition onto root 3 x root 3-Al/Si(111) template by scanning tunneling microscopy".SURFACE SCIENCE 600.15(2006):3072. |
入库方式： OAI收割
来源：物理研究所
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