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The AM05 density functional applied to solids.

Ann E Mattsson1, Rickard Armiento, Joachim Paier

  • 1Multiscale Dynamic Materials Modeling MS 1322, Sandia National Laboratories, Albuquerque, New Mexico 87185-1322, USA. aematts@sandia.gov

The Journal of Chemical Physics
|March 5, 2008
PubMed
Summary
This summary is machine-generated.

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The AM05 functional performs exceptionally well for solids and surfaces, matching hybrid density functionals. This semilocal density approximation offers a faster, accurate alternative for electronic structure calculations.

Area of Science:

  • Solid-state physics
  • Quantum chemistry
  • Materials science

Background:

  • Hybrid density functionals offer excellent accuracy for solids but are computationally expensive.
  • Semilocal density functionals, like AM05, are computationally faster but their performance for solids needs thorough evaluation.
  • Previous studies suggested AM05 is promising for solids, but further validation is crucial.

Purpose of the Study:

  • To evaluate the performance of the AM05 functional for solids.
  • To compare AM05 with established hybrid functionals and other semilocal functionals (LDA, PBE).
  • To confirm the computational efficiency and accuracy of AM05 for solid-state calculations.

Main Methods:

  • Utilized the AM05 density functional for electronic structure calculations.

Related Experiment Videos

  • Compared AM05 results with data from hybrid density functionals and local density approximation (LDA) and Perdew-Burke-Ernzerhof (PBE) functionals.
  • Performed calculations using multiple electronic-structure codes to assess numerical errors.

    • Main Results:

    • The AM05 functional demonstrates performance comparable to hybrid density functionals for solids.
    • AM05 shows superior average performance compared to the best combination of LDA and PBE functionals for each solid.
    • Numerical errors were found to be insignificant, comparable to or smaller than experimental uncertainties.

    Conclusions:

    • The AM05 functional is a highly accurate and efficient choice for electronic structure calculations of solids.
    • AM05 provides a computationally advantageous alternative to slower hybrid functionals without sacrificing accuracy.
    • The findings confirm AM05's exceptional performance for solid and surface properties.