Inelastic response of silicon to shock compression.
Inelastic response of silicon to shock compression.
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DOI：
10.1038/srep24211
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发表时间：
2016-04-13
影响因子：
4.6
通讯作者：
Wark JS
中科院分区：
文献类型：
--
作者：
Higginbotham A;Stubley PG;Comley AJ;Eggert JH;Foster JM;Kalantar DH;McGonegle D;Patel S;Peacock LJ;Rothman SD;Smith RF;Suggit MJ;Wark JS
[001]取向硅对激光压缩的弹性和非弹性响应已经是一个相当多的讨论了十多年的话题，但在理解这种表面上简单的材料的基本行为方面几乎没有进展。我们目前的实验X射线衍射数据显示复杂的弹性应变曲线在纳秒时间尺度上的激光压缩样品。我们还提出了分子动力学和弹性代码建模，这表明压力引起的相变是以前报道的“异常”弹性波的原因。此外，这种解释允许测量过渡的动力学时间尺度。该模型也讨论了在更广泛的背景下，报告的硅变形快速压缩的文献。
The elastic and inelastic response of [001] oriented silicon to laser compression has been a topic of considerable discussion for well over a decade, yet there has been little progress in understanding the basic behaviour of this apparently simple material. We present experimental x-ray diffraction data showing complex elastic strain profiles in laser compressed samples on nanosecond timescales. We also present molecular dynamics and elasticity code modelling which suggests that a pressure induced phase transition is the cause of the previously reported ‘anomalous’ elastic waves. Moreover, this interpretation allows for measurement of the kinetic timescales for transition. This model is also discussed in the wider context of reported deformation of silicon to rapid compression in the literature.