中国物理B ›› 2015, Vol. 24 ›› Issue (5): 56801-056801.doi: 10.1088/1674-1056/24/5/056801
• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇 下一篇
郑晓虎a, 张苗a, 黄安平b, 肖志松b, 朱剑豪c, 王曦a, 狄增峰a
Zheng Xiao-Hu (郑晓虎)a, Zhang Miao (张苗)a, Huang An-Ping (黄安平)b, Xiao Zhi-Song (肖志松)b, Paul K Chu (朱剑豪)c, Wang Xi (王曦)a, Di Zeng-Feng (狄增峰)a
摘要: During the irradiation of Ge surface with Ga+ ions up to 1017 ions·cm-2, various patterns from ordered honeycomb to nanograss structure appear to be decided by the ion beam energy. The resulting surface morphologies have been studied by scanning electron microscopy and atomic force microscopy. For high energy Ga+ irradiation (16–30 keV), by controlling the ion fluence, we have captured that the equilibrium nanograss morphology also originates from the ordered honeycomb structure. When honeycomb holes are formed by ion erosion, heterogeneous distribution of the deposited energy along the holes leads to viscous flow from the bottom to the plateau. Redistribution of target atoms results in the growth of protuberances on the plateau, and finally the pattern evolution from honeycomb to nanograss with an equilibrium condition.
中图分类号: (Semiconductors)