Hybrid functional pseudopotentials

Hybrid functional pseudopotentials
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DOI:
10.1103/physrevb.97.085130
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发表时间:
2017-03
期刊:
影响因子:
3.7
通讯作者:
Jing Yang;L. Tan;A. Rappe
Jing Yang;L. Tan;A. Rappe
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Jing Yang;L. Tan;A. Rappe

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在赝势结构中使用的交换关联泛函与实际密度泛函理论计算中使用的交换关联泛函之间的一致性对于精确预测材料的基本性质是必不可少的。然而,常规的杂化密度泛函计算目前仍然依赖于GGA赝势,由于缺乏混合功能的赝势。在这里,我们提出了一个计划,以产生混合泛函赝势,我们分析的重要性赝势密度泛函的一致性的混合泛函。我们基准我们的PBE 0赝势的结构参数和基本的电子间隙的G2分子数据集和一些简单的固体。我们的研究结果表明,使用我们的新PBE 0赝势PBE 0计算提高了与全电子计算的一致性。
The consistency between the exchange-correlation functional used in pseudopotential construction and in the actual density functional theory calculation is essential for the accurate prediction of fundamental properties of materials. However, routine hybrid density functional calculations at present still rely on GGA pseudopotentials due to the lack of hybrid functional pseudopotentials. Here, we present a scheme for generating hybrid functional pseudopotentials, and we analyze the importance of pseudopotential density functional consistency for hybrid functionals. We benchmark our PBE0 pseudopotentials for structural parameters and fundamental electronic gaps of the G2 molecular dataset and some simple solids. Our results show that using our new PBE0 pseudopotentials in PBE0 calculations improves agreement with respect to all-electron calculations.