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[交流] 如何用CP2K计算水空气界面处的电场大小

各位小哥哥,各位大佬们,请教一个问题呀~
是这样的,我的研究课题是关于水空气界面的分子动力学模拟,我花了两个月时间的摸索,才终于用256个水分子建立的水层用CP2K跑出来一个NVT的平衡构型,
像这篇文献中所展示的这样~
然后我希望计算这些水分子在界面处产生的电场大小~

在我所参考的文章的末尾提到了这样一段:“The electric field at the air–water interface E(z) has been obtained fully ab initio from the optimized electronic wave function and the positions of the nuclei, at a given time along the trajectory, using the standard routine implemented in the CP2K (47, 48) package. E(z) has been calculated each 100 fs and then averaged over these sampled points. ”
但是并没有具体说这个E(z)是如何得到的~好像是很容易获得的东东?所以想请教下各位,能不能教教我这个电场是怎样计算得到的呀!万分感谢大家了!

参考文献:2D H-Bond Network as the Topmost Skin to the Air–Water Interface(https://doi.org/10.1021/acs.jpclett.7b01257)

如何用CP2K计算水空气界面处的电场大小


如何用CP2K计算水空气界面处的电场大小-1


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