Nanoplasmonics simulations at the basis set limit through completeness-optimized, local numerical basis sets

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Researchers

Research units

  • Lawrence Berkeley National Laboratory

Abstract

We present an approach for generating local numerical basis sets of improving accuracy for first-principles nanoplasmonics simulations within time-dependent density functional theory. The method is demonstrated for copper, silver, and gold nanoparticles that are of experimental interest but computationally demanding due to the semi-core d-electrons that affect their plasmonic response. The basis sets are constructed by augmenting numerical atomic orbital basis sets by truncated Gaussian-type orbitals generated by the completeness-optimization scheme, which is applied to the photoabsorption spectra of homoatomic metal atom dimers. We obtain basis sets of improving accuracy up to the complete basis set limit and demonstrate that the performance of the basis sets transfers to simulations of larger nanoparticles and nanoalloys as well as to calculations with various exchange-correlation functionals. This work promotes the use of the local basis set approach of controllable accuracy in first-principles nanoplasmonics simulations and beyond.

Details

Original languageEnglish
Article number094114
Pages (from-to)1-9
Number of pages9
JournalJournal of Chemical Physics
Volume142
Issue number9
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed

    Research areas

  • basis sets, completeness-optimization, nanoplasmonics, time-dependent density functional theory

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