arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0909.5490cond-mat.mtrl-sci
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赝势计算中的核重构

Core reconstruction in pseudopotential calculations

J. R. Trail, D. M. Bird

摘要:

本文提出了一种从赝势计算中获得全电子结果的新方法。这是通过使用Inglesfield的嵌入势方法在原子核区域中进行局部计算来实现的[J.Phys. C { \bf 14},3795(1981)]。在这种方法中,核心区域是\emph{reconstructed},并且没有进行先前解决该问题所需的简化近似(例如电荷密度/电势的球形对称或冻结核心电子)。嵌入方法需要一个准确的实空间格林函数,并给出了一组数值本征态在构建这个引入的误差分析。结果提出了散装铝的全电子重建,电荷密度和态密度。

英文摘要:

A new method is presented for obtaining all-electron results from a pseudopotential calculation. This is achieved by carrying out a localised calculation in the region of an atomic nucleus using the embedding potential method of Inglesfield [J.Phys. C {\bf 14}, 3795 (1981)]. In this method the core region is \emph{reconstructed}, and none of the simplifying approximations (such as spherical symmetry of the charge density/potential or frozen core electrons) that previous solutions to this problem have required are made. The embedding method requires an accurate real space Green function, and an analysis of the errors introduced in constructing this from a set of numerical eigenstates is given. Results are presented for an all-electron reconstruction of bulk aluminium, for both the charge density and the density of states.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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