Ab Initio Molecular Dynamics with Maximally Localized Wannier Functions

Manu Sharma, Yudong Wu, Roberto Car

Research output: Contribution to journalArticle

48 Scopus citations

Abstract

We present a novel formulation of ab initio molecular dynamics that should be useful to simulate insulating systems. In this scheme maximally localized Wannier functions instead of delocalized Bloch states evolve on the fly during nuclear dynamics. Localized Wannier orbitals offer several advantages over orbitals that are delocalized in the entire simulation cell. In fact, at variance with the latter, they provide a picture of the electronic bonds consistent with simple chemical intuition. In addition, by taking advantage of their exponential localization it should be possible to develop ab initio molecular dynamics schemes having a computational cost that scales linearly rather than cubically with system size. We show that maximally localized Wannier functions can be calculated efficiently within Car-Parrinello dynamics and use water in gas and liquid phase as a test system to demonstrate our scheme and illustrate its usefulness.

Original languageEnglish (US)
Pages (from-to)821-829
Number of pages9
JournalInternational Journal of Quantum Chemistry
Volume95
Issue number6
DOIs
StatePublished - Dec 20 2003

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Keywords

  • Ab initio molecular dynamics
  • Car-Parrinello dynamics
  • Maximally localized Wannier functions

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