Orbital-free density functional theory: Linear scaling methods for kinetic potentials, and applications to solid Al and Si

Jeng Da Chai, Vincent L. Lignères, Gregory Ho, Emily A. Carter, John D. Weeks

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

In orbital-free density functional theory the kinetic potential (KP), the functional derivative of the kinetic energy density functional, appears in the Euler equation for the electron density and may be more amenable to simple approximations. We study properties of two solid-state systems, Al and Si, using two nonlocal KPs that gave good results for atoms. Very accurate results are found for Al, but results for Si are much less satisfactory, illustrating the general need for a better treatment of extended covalent systems. A different integration pathway in the KP formalism may prove useful in attacking this fundamental problem.

Original languageEnglish (US)
Pages (from-to)263-267
Number of pages5
JournalChemical Physics Letters
Volume473
Issue number4-6
DOIs
StatePublished - May 12 2009

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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