Order- N implementation of exact exchange in extended insulating systems

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Abstract

Exact (Hartree-Fock) exchange is needed to overcome some of the limitations of local and semilocal approximations of density-functional theory. So far, however, computational cost has limited the use of exact exchange in plane-wave calculations for extended systems. We show that this difficulty can be overcome by performing a unitary transformation from Bloch to maximally localized Wannier functions in combination with an efficient technique to compute real-space Coulomb integrals. The resulting scheme scales linearly with system size. We validate the scheme with representative applications.

Original languageAmerican English
Article number085102
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume79
Issue number8
DOIs
StatePublished - Feb 2 2009

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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