Crystalline structures and misfit strain inside Er silicide nanocrystals self-assembled on Si(001) substrates |
| |
Authors: | Ding Tao Wu Yueqin Song Junqiang Li Juan Huang Han Zou Jin Cai Qun |
| |
Affiliation: | State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai, People's Republic of China. |
| |
Abstract: | The morphology and crystalline structure of Er silicide nanocrystals self-assembled on the Si(001) substrate were investigated using scanning tunneling microscopy (STM) and transmission electron microscopy (TEM). It was found that the nanowires and nanorods formed at 630?°C has dominant hexagonal AlB(2)-type structure, while inside the nanoislands self-organized at 800?°C the tetragonal ThSi(2)-type structure is prevalent. The lattice analysis via cross-sectional high-resolution TEM demonstrated that internal misfit strain plays an important role in controlling the growth of nanocrystals. With the relaxation of strain, the nanoislands could evolve from a pyramid-like shape into a truncated-hut-like shape. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|