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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >A fast doubly hybrid density functional method close to chemical accuracy using a local opposite spin ansatz
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A fast doubly hybrid density functional method close to chemical accuracy using a local opposite spin ansatz

机译:使用局部相对自旋ansatz的接近化学精度的快速双杂化密度泛函方法

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摘要

We develop and validate the XYGJ-OS functional, based on the adiabatic connection formalism and Gorling-Levy perturbation theory to second order and using the opposite-spin (OS) ansatz combined with locality of electron correlation. XYGJ-OS with local implementation scales as N3 with an overall accuracy of 1.28 kcal/ mol for thermochemistry, bond dissociation energies, reaction barrier heights, and nonbonded interactions, comparable to that of 1.06 kcal/mol for the accurate coupled-cluster based G3 method (scales as N~7) and much better than many popular density functional theory methods: B3LYP (4.98), PBEO (4.36), and PBE (12.10).
机译:我们基于绝热连接形式主义和Gorling-Levy微扰理论,将二阶反对称(OS)ansatz与电子相关性相结合,开发并验证XYGJ-OS功能。 XYGJ-OS的局部实施规模为N3,热化学,键解离能,反应势垒高度和非键相互作用的整体精度为1.28 kcal / mol,与基于G3方法的精确耦合簇的整体精度为1.06 kcal / mol (标度为N〜7),并且比许多流行的密度泛函理论方法更好:B3LYP(4.98),PBEO(4.36)和PBE(12.10)。

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    Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Ministry of education (MOE) Laboratory for Computational Physical Science, Fudan University, Shanghai 200433, China,State Key Laboratory of Physical Chemistry of Solid Surfaces, College for Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China;

    Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Ministry of education (MOE) Laboratory for Computational Physical Science, Fudan University, Shanghai 200433, China,State Key Laboratory of Physical Chemistry of Solid Surfaces, College for Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China;

    World Class University (WCU) Professor Program at the Graduate School of Energy, Environment, Water, and Sustainability (EEWS), Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea;

    World Class University (WCU) Professor Program at the Graduate School of Energy, Environment, Water, and Sustainability (EEWS), Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea,Materials and Process Simulation Center (139-74), California Institute of Technology, Pasadena, CA 91125;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    ACM; DHDF; GGA; LDA; MAD;

    机译:ACM;DHDF;GGA;LDA;狂;

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