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• W1627659616 abstract "Plane wave density functional theory (DFT) is a powerful tool for gaining accurate, atomic level insight into bulk and surface structures. Yet, the delocalized nature of the plane wave basis set hinders the application of many powerful post-computation analysis approaches, many of which rely on localized atom-centered basis sets. Traditionally, this gap has been bridged via projection-based techniques from a plane wave to atom-centered basis. We instead propose an alternative projection-free approach utilizing direct calculation of matrix elements of the converged plane wave DFT Hamiltonian in an atom-centered basis. This projection-free approach yields a number of compelling advantages, including strict orthonormality of the resulting bands without artificial band mixing and access to the Hamiltonian matrix elements, while faithfully preserving the underlying DFT band structure. The resulting atomic orbital representation of the Kohn-Sham wavefunction and Hamiltonian provides a gateway to a wide variety of analysis approaches. We demonstrate the utility of the approach for a diverse set of chemical systems and example analysis approaches." @default.
• W1627659616 created "2016-06-24" @default.
• W1627659616 creator A5059093251 @default.
• W1627659616 creator A5088916558 @default.
• W1627659616 date "2015-09-11" @default.
• W1627659616 modified "2023-10-18" @default.
• W1627659616 title "A projection-free method for representing plane-wave DFT results in an atom-centered basis" @default.
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• W1627659616 doi "https://doi.org/10.1063/1.4930015" @default.
• W1627659616 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/26374020" @default.
• W1627659616 hasPublicationYear "2015" @default.
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