当前位置: X-MOL 学术J. Nucl. Mater. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
MD simulation of two-temperature model in ion irradiation of 3C-SiC: Effects of electronic and nuclear stopping coupling, ion energy and crystal orientation
Journal of Nuclear Materials ( IF 2.8 ) Pub Date : 2021-09-25 , DOI: 10.1016/j.jnucmat.2021.153313
Jintong Wu 1, 2 , Zongwei Xu 1 , Junlei Zhao 3 , Mathias Rommel 4 , Kai Nordlund 5 , Fei Ren 1 , Fengzhou Fang 1, 2
Affiliation  

We present a numerical study on swift ion induced effects in crystalline 3C silicon carbide (SiC) by the two-temperature model, which considering the electronic stopping and electronic-phonon coupling effects simultaneously. Given the results of overlapping radiation, there is only a minority of defects formed in the system during the ionization dominance stage. When the incident energy is braked from 20 MeV to 500 keV by ionization after the first 0.91 ps, the system enters the nuclear stopping stage, the incident energy decreases to 50 keV in 0.44 ps, accomplished with a dramatic increase of damage. In addition, for the low-energy ion implantation process, the sparse atomic arrangement perpendicular to the implantation direction will reduce the response of the atomic subsystem. Insights into the complex correlations between electronic and atomic response may pave the way to elucidate the mechanism behind the experimentally observed defect formation and evolution under extreme energy deposition.



中文翻译:

3C-SiC离子辐照两温度模型的MD模拟:电子和核停止耦合、离子能量和晶体取向的影响

我们通过双温度模型对晶体 3C 碳化硅 (SiC) 中的快速离子诱导效应进行了数值研究,该模型同时考虑了电子停止和电子-声子耦合效应。鉴于重叠辐射的结果,在电离优势阶段,系统中只形成了少数缺陷。当入射能量在前 0.91 ps 后通过电离从 20 MeV 制动到 500 keV 时,系统进入核停止阶段,入射能量在 0.44 ps 内下降到 50 keV,损伤急剧增加。此外,对于低能离子注入工艺,垂直于注入方向的稀疏原子排列会降低原子子系统的响应。

更新日期:2021-10-01
down
wechat
bug