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Self-consistent field algorithms for Kohn-Sham models with fractional occupation numbers

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Abstract

Relaxed constraint algorithms (RCA) were proposed to solve the extended Kohn-Sham problem. RCA consisted of allowing fractional occupancy of the molecular orbitals during minimization procedure. The simulatneous optimization of energy levels and the occupation numbers was broken through RCA. RCA provided better robustness properties than any other self-consistent field algorithms. The numerical solution of Kohn-Sham equation was lower in energy when computed with RCA.

Original languageEnglish
Pages (from-to)10616-10622
Number of pages7
JournalJournal of Chemical Physics
Volume114
Issue number24
DOIs
Publication statusPublished - 22 Jun 2001

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