Ewald summation on a helix: a route to self-consistent charge density-functional based tight-binding objective molecular dynamics

Ilia Nikiforov, Benjamin Hourahine, B. Aradi, Th. Frauenheim, Traian Dumitrică

Research output: Contribution to journalArticle

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Abstract

We explore the generalization to the helical case of the classical Ewald method, the harbinger of all modern self-consistent treatments of waves in crystals, including ab initio electronic structure methods. Ewald-like formulas that do not rely on a unit cell with translational symmetry prove to be numerically tractable and able to provide the crucial component needed for coupling objective molecular dynamics with the self-consistent charge density-functional based tight-binding treatment of the inter-atomic interactions. The robustness of the method in addressing complex hetero-nuclear nano- and bio-systems is demonstrated with illustrative simulations on a helical boron nitride nanotube, a screw dislocated zinc oxide nanowire, and an ideal DNA molecule.
Original languageEnglish
Article number094110
Number of pages9
JournalJournal of Chemical Physics
Volume139
Early online date4 Sep 2013
DOIs
Publication statusPublished - 14 Sep 2013

Keywords

  • helical electrostratics dispersion electronic structure
  • ewald summation
  • tight-binding objective
  • molecular dynamics

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