Fast and robust all-electron density functional theory calculations in solids using orthogonalized enriched finite elements
Nelson D. Rufus,
Bikash Kanungo,
Vikram Gavini
Abstract:We present a computationally efficient approach to perform systematically convergent real-space all-electron Kohn-Sham DFT calculations for solids using an enriched finite element (FE) basis. The enriched FE basis is constructed by augmenting the classical FE basis with atom-centered numerical basis functions, comprising of atomic solutions to the Kohn-Sham problem. Notably, to improve the conditioning we orthogonalize the enrichment functions with respect to the classical FE basis, without sacrificing the loc… Show more
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