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The European Physical Journal D

, Volume 43, Issue 1–3, pp 173–176 | Cite as

A new real-space algorithm for realistic density functional calculations

  • E. KrotscheckEmail author
  • E. R. Hernández
  • S. Janecek
  • M. S. Kaczmarski
  • R. Wahl
Clusters and Surfaces

Abstract.

We present the implementation of a fast real-space algorithm for density functional calculations for atomic nanoclusters. The numerical method is based on a fourth-order operator splitting technique for the solution of the Kohn-Sham equation [1]. The convergence of the procedure is about one order of magnitude better than that of previously used second-order operator factorizations. The method has now been extended to deal with non-local pseudopotentials of the Kleinman-Bylander [2] type, permitting calculations for realistic systems, without significantly degrading the convergence rate. We demonstrate the convergence of the method for the examples C and C60 and present examples of structure calculations of Na and Mg clusters.

PACS.

71.15.Mb Density functional theory, local density approximation, gradient and other corrections 61.46.Bc Clusters 

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Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2007

Authors and Affiliations

  • E. Krotscheck
    • 1
    Email author
  • E. R. Hernández
    • 2
  • S. Janecek
    • 1
  • M. S. Kaczmarski
    • 2
    • 3
  • R. Wahl
    • 1
  1. 1.Institut für Theoretische Physik, Johannes Kepler UniversitätLinzAustria
  2. 2.Institut de Ciència de Materials de Barcelona (ICMAB–CSIC) Campus de BellaterraBarcelonaSpain
  3. 3.Institute of Physics, University of SilesiaKatowicePoland

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