DFTB+, a sparse matrix-based implementation of the DFTB method

B. Aradi, B. Hourahine, Th. Frauenheim

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1266 Citations (Scopus)


A new Fortran 95 implementation of the DFTB (density functional-based tight binding) method has been developed, where the sparsity of the DFTB system of equations has been exploited. Conventional dense algebra is used only to evaluate the eigenproblems of the system and long-range Coulombic terms, but drop-in O(N) or O(N-2) modules are planned to replace the small code sections that these entail. The developed sparse storage structure is discussed in detail, and a short overview of other features of the new code is given.

Original languageEnglish
Pages (from-to)5678-5684
Number of pages7
JournalJournal of Physical Chemistry A
Issue number26
Publication statusPublished - 5 Jul 2007


  • electronic structur calculations
  • density functional theory
  • tight binding method
  • ewald sums
  • convergence
  • simulations
  • potentials
  • molecules


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