Dynamic ion structure factor of warm dense matter.
Dynamic ion structure factor of warm dense matter.
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DOI：
10.1103/physrevlett.109.225001
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发表时间：
2012-11
影响因子：
8.6
通讯作者：
J. Vorberger;Zoltán Donkó;I. M. Tkachenko;D. Gericke
中科院分区：
文献类型：
--
作者：
J. Vorberger;Zoltán Donkó;I. M. Tkachenko;D. Gericke
在温暖的致密物质的离子结构的动力学是由分子动力学模拟使用有效的离子-离子势。这种潜力是从从头计算模拟得到的，并具有很强的短程排斥添加到屏蔽库仑势。基于静态或动态局部场校正的模型被发现不足以描述数据。一个扩展的Mermin方法，一个流体动力学模型，和局部约束的矩量法是能够再现的数值结果，但有相当有限的预测能力，因为它们都需要一些数值数据作为输入。矩量法被认为是最有前途的。
The dynamics of the ion structure in warm dense matter is determined by molecular dynamics simulations using an effective ion-ion potential. This potential is obtained from ab initio simulations and has a strong short-range repulsion added to a screened Coulomb potential. Models based on static or dynamic local field corrections are found to be insufficient to describe the data. An extended Mermin approach, a hydrodynamic model, and the method of moments with local constraints are capable of reproducing the numerical results but have rather limited predictive powers as they all need some numerical data as input. The method of moments is found to be the most promising.