M11pz:一个非局部的元函数,具有零哈特里-福克交换,并且对化学能量和结构具有广泛的准确性
Siriluk Kanchanakungwankul1, Pragya Verma1, Benjamin G Janesko2
1Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States.
Journal of chemical theory and computation
|December 14, 2023
概括
我们介绍了M11pz,这是Kohn-Sham密度函数理论的新交换相关函数. M11pz通过使用特定的术语而不是Hartree-Fock交换来提高强相关系统的准确性.
科学领域:
- 计算化学计算化学
- 量子化学 是一个量子化学.
- 材料科学 材料科学 材料科学
背景情况:
- 科恩-沙姆密度函数理论 (KS-DFT) 的准确性在很大程度上依赖于交换相关性 (XC) 函数近似.
- 强烈相关的系统对现有的XC函数构成重大挑战.
研究的目的:
- 开发一个新的XC功能,M11pz,旨在提高强相关系系统的精度.
- 从M11plus功能中使用特定的"rung-3.5"术语,而无需整合Hartree-Fock交换.
主要方法:
- 开发了M11pz通过优化本地和rang-3.5的成分,不包括Hartree-Fock交换.
- 在各种化学数据库中对其他八个本地函数进行了M11pz性能评估.
- 评估M11pz用于计算固体中的带间隙.
主要成果:
- 在八个基准数据库 (AME418/22,MGBE172,TMBE40,SR309,MR54,BH192,NC579,MS20) 中平均计算时,M11pz位列前三名的功能数据.
- M11pz在预测原子和分子能量,键能,屏障高度和非对应相互作用方面表现出色.
- 对于固态带隙计算,M11pz在9个测试的函数中获得了第二好的性能,Hartree-Fock交换为零.
结论:
- M11pz在KS-DFT的XC功能开发中提供了一个有前途的进步.
- 函数式对改善强相关系系统和固态特性描述具有特别的实用性.
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