A step in the direction of resolving the paradox of Perdew-Zunger self-interaction correction.

A step in the direction of resolving the paradox of Perdew-Zunger self-interaction correction.
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朝着解决 Perdew-Zunger 自相互作用校正悖论的方向迈出了一步。

DOI:
10.1063/1.5129533
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发表时间:
2019
期刊:
The Journal of chemical physics
影响因子:
--
通讯作者:
J. Perdew
J. Perdew
中科院分区:
--
文献类型:
--
作者:
R. Zope;Yoh Yamamoto;Carlos M Diaz;T. Baruah;J. Peralta;K. Jackson;B. Santra;J. Perdew

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自相互作用 (SI) 误差是在近似交换相关对总能量的贡献时产生的,限制了许多密度函数近似的可靠性。 Perdew-Zunger SI 校正 (PZSIC) 与局域自旋密度近似 (LSDA) 结合使用时,可以改进许多属性的描述,但总体而言,这种改进是有限的。在这里,我们建议对 PZSIC 进行修改,使用等轨道指示器来识别应应用本地 SIC 的区域。使用这种局部尺度 SIC (LSIC) 方法和 LSDA,我们分析了各种属性的预测,包括原子的总能量、电离势和电子亲和力,以及分子的原子化能、离解能曲线、反应能量和反应势垒高度。 LSIC 保留了 PZSIC-LSDA 成功特性的结果,并为研究的许多其他特性提供了显着的改进。使用 LSIC 计算的原子化能优于 Perdew、Burke 和 Ernzerhof 广义梯度近似 (GGA),并且接近使用强约束和适当规范的元 GGA 获得的原子化能。 LSIC 还恢复了 PZSIC-LSDA 中损失的交换能量的统一气体限制。进一步的性能改进可以通过局部缩放因子和特定密度泛函近似的适当组合或修改来获得。
Self-interaction (SI) error, which results when exchange-correlation contributions to the total energy are approximated, limits the reliability of many density functional approximations. The Perdew-Zunger SI correction (PZSIC), when applied in conjunction with the local spin density approximation (LSDA), improves the description of many properties, but overall, this improvement is limited. Here, we propose a modification to PZSIC that uses an iso-orbital indicator to identify regions where local SICs should be applied. Using this local-scaling SIC (LSIC) approach with LSDA, we analyze predictions for a wide range of properties including, for atoms, total energies, ionization potentials, and electron affinities and, for molecules, atomization energies, dissociation energy curves, reaction energies, and reaction barrier heights. LSIC preserves the results of PZSIC-LSDA for properties where it is successful and provides dramatic improvements for many of the other properties studied. Atomization energies calculated using LSIC are better than those of the Perdew, Burke, and Ernzerhof generalized gradient approximation (GGA) and close to those obtained with the strongly constrained and appropriately normed meta-GGA. LSIC also restores the uniform gas limit for the exchange energy that is lost in PZSIC-LSDA. Further performance improvements may be obtained by an appropriate combination or modification of the local scaling factor and the particular density functional approximation.
DOI: 10.1016/j.softx.2017.11.002
发表时间: 2018-01-01
期刊: SOFTWAREX
影响因子: 3.4
作者:
Lehtola, Susi;Steigemann, Conrad;Marques, Miguel A. L.
通讯作者: Marques, Miguel A. L.
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DOI: 10.1063/1.4865942
发表时间: 2014
期刊: The Journal of chemical physics
影响因子: --
作者:
T. Schmidt;E. Kraisler;L. Kronik;S. Kümmel
通讯作者: S. Kümmel