Density-related properties from self-interaction corrected density functional theory calculations

The Perdew–Zunger self-interaction correction (PZ-SIC) removes unphysical electron self-interaction from calculations employing standard density functional approximations. Doing so improves many computed properties, bringing them into better agreement with experimental observations or with results f...

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Veröffentlicht in:The Journal of chemical physics 2021-01, Vol.154 (2), p.024102-024102
Hauptverfasser: Withanage, Kushantha P. K., Bhattarai, Puskar, Peralta, Juan E., Zope, Rajendra R., Baruah, Tunna, Perdew, John P., Jackson, Koblar A.
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container_issue 2
container_start_page 024102
container_title The Journal of chemical physics
container_volume 154
creator Withanage, Kushantha P. K.
Bhattarai, Puskar
Peralta, Juan E.
Zope, Rajendra R.
Baruah, Tunna
Perdew, John P.
Jackson, Koblar A.
description The Perdew–Zunger self-interaction correction (PZ-SIC) removes unphysical electron self-interaction from calculations employing standard density functional approximations. Doing so improves many computed properties, bringing them into better agreement with experimental observations or with results from high-level quantum chemistry calculations. However, while PZ-SIC generally corrects in the right direction relative to the corresponding reference values, in many cases, it over-corrects. For this reason, scaled-down versions of PZ-SIC have been proposed and investigated. These approaches have mostly employed exterior scaling in which SIC correction terms are scaled in the same way at every point in space. Recently, a new local, or interior, scaling SIC method was proposed on non-empirical grounds to restore a property of the exact, but unknown, density functional that is broken in PZ-SIC. In this approach, the scaling at each point depends on the character of the charge density at that point. However, the local scaling can be done in various ways while still restoring the behavior of the exact functional. In this work, we compare and contrast the performance of various interior scaling approaches for addressing over-corrections of calculated molecular dipole moments and atomic polarizabilities and properties that reflect the nature of the electronic charge density.
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source AIP Journals Complete; Alma/SFX Local Collection
subjects Charge density
Density functional theory
Dipole moments
Mathematical analysis
Properties (attributes)
Quantum chemistry
Scaling
title Density-related properties from self-interaction corrected density functional theory calculations
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