使用非线性核心校正,保持规范的伪潜在的更高的可转移性和准确性
Wan-Lu Li1,2,3,4, Kaixuan Chen1,2,3, Elliot Rossomme1,2
1Kenneth S. Pitzer Center for Theoretical Chemistry USA.
Chemical science
|October 13, 2023
概括
具有非线性核心校正 (NLCC) 的伪潜体在密度函数中显示出良好的可转移性,显著改善热化学性质,特别是对共价相互作用的原子化能量.
科学领域:
- 计算化学计算化学
- 材料科学 材料科学 材料科学
- 量子化学 是一个量子化学.
背景情况:
- 具有非线性核心校正 (NLCC) 的伪电位 (PP) 对于准确的电子结构计算至关重要.
- 评估这些PP在各种功能上的可转移性对于可靠的预测至关重要.
研究的目的:
- 调查Goedecker,Teter和Hutter (GTH) 协议PPs与NLCC在GGA,元GGA和混合功能之间可转移性的研究.
- 评估这些防护材料对热化学和非热化学性能的影响.
主要方法:
- 使用了GTH协议伪电位与非线性核心校正.
- 在PBE,PBE0, ωB97X-V和B97M-rV函数之间测试了可转移性.
- 将结果与全电子计算进行比较,并重新优化NLCC参数.
主要成果:
- PBE-NLCC PP对 PBE0 和 ωB97X-V 函数具有显著的可转移性,显著改善了热化学基准.
- 通过重新优化NLCC参数来缓解B97M-rV与PBE衍生的PP的糟糕性能.
- 原子化能量显示出最大的改善,突出了NLCC对共价相互作用的重要性.
结论:
- GTH-NLCC PPs为各种功能提供了可靠的方法,特别是对共价相互作用.
- NLCC为原子化能量提供了至关重要的校正,提高了化学反应性研究的准确性.
- 与MOLOPT基础集相结合,NLCC-GTH PPs在凝结相模拟中产生了良好的结果.
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