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arXiv 1201.5698physics.comp-ph
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Kohn-Sham密度泛函理论的元素轨道

Element orbitals for Kohn-Sham density functional theory

Lin Lin, Lexing Ying

摘要:

我们提出了一种方法来离散的Kohn-Sham哈密顿矩阵的赝势框架下的一个小的一组基函数自动收缩从一个统一的基组,如平面波。每个基函数被局部化在一个元素周围,该元素是包含多个原子的全局域的一小部分。我们证明,所得到的基组达到毫电子伏的精度为3D密集堆积系统,每个原子的基函数的数量很少。本程序适用于绝缘和金属系统。

英文摘要:

We present a method to discretize the Kohn-Sham Hamiltonian matrix in the pseudopotential framework by a small set of basis functions automatically contracted from a uniform basis set such as planewaves. Each basis function is localized around an element, which is a small part of the global domain containing multiple atoms. We demonstrate that the resulting basis set achieves meV accuracy for 3D densely packed systems with a small number of basis functions per atom. The procedure is applicable to insulating and metallic systems.

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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