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arXiv 1910.03073cond-mat.mtrl-sciphysics.chem-ph
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范德瓦尔斯相互作用的密度泛函模型:用非局部泛函统一多体原子方法

Density-functional model for van der Waals interactions: Unifying many-body atomic approaches with nonlocal functionals

Jan Hermann, Alexandre Tkatchenko

摘要:

非共价范德华(vdW)相互作用是造成物质中广泛现象的原因。流行的密度泛函方法,治疗vdW相互作用使用不同的物理模型,这些复杂的力量,因此,这些方法的适用性往往限于一个子集的相关分子和材料。针对vdW相互作用的通用密度泛函模型,在这里,我们统一了两种互补的方法:非局部vdW泛函的极化和多体相互作用的原子间方法。所开发的非局部多体色散方法(MBD-NL)提高了现有vdW泛函的准确性和效率,并被证明广泛适用于分子,软,硬材料,包括离子和金属化合物,以及有机/无机界面。

英文摘要:

Noncovalent van der Waals (vdW) interactions are responsible for a wide range of phenomena in matter. Popular density-functional methods that treat vdW interactions use disparate physical models for these intricate forces, and as a result the applicability of these methods is often restricted to a subset of relevant molecules and materials. Aiming towards a general-purpose density functional model of vdW interactions, here we unify two complementary approaches: nonlocal vdW functionals for polarization and interatomic methods for many-body interactions. The developed nonlocal many-body dispersion method (MBD-NL) increases the accuracy and efficiency of existing vdW functionals and is shown to be broadly applicable to molecules, soft and hard materials including ionic and metallic compounds, as well as organic/inorganic interfaces.

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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