Self-consistent relativistic full-potential Korringa-Kohn-Rostoker total-energy method and applications

S. Bei Der Kellen, Arthur J Freeman

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

The self-consistent full-potential total-energy Korringa-Kohn-Rostoker electronic-structure method is generalized to include all relativistic effects. The Dirac equation for a general anisotropic 4×4 potential is solved inside Voronoi polyhedra surrounding each basis atom. As an illustration, the method is used to calculate the self-consistent electronic band structure, the Fermi surface, the equilibrium lattice constant and the bulk modulus of the fee transition metals Pd, Ir, Pt, and Au. If the cutoff of the multipole expansions of the wave functions is at least /max=4, the calculated equilibrium lattice constants of the transition metals deviate from experiment by less than 1%, and the calculated bulk moduli deviate between 6% and 20%, which is comparable to results of other local-density calculations. In addition, the method is used to calculate the self-consistent electronic band structure of the semiconductors GaAs, InSb, and InN, and the equilibrium lattice constant and the bulk modulus of InSb. We find that the inclusion of both spin-orbit coupling and full-potential effects influences the size of the valence-band-width and the band gap in comparison with scalar relativistic local-density calculations. Interestingly, if after self-consistency has been achieved in scalar relativistic calculations, spin-orbit coupling is taken into account by the so-called second variation, the energy bands are found to agree very well with the results obtained here with the full relativistic treatment.

Original languageEnglish
Pages (from-to)11187-11198
Number of pages12
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume54
Issue number16
Publication statusPublished - Oct 15 1996

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energy methods
bulk modulus
Band structure
Lattice constants
Elastic moduli
Transition metals
Orbits
transition metals
scalars
orbits
Fermi surface
relativistic effects
Dirac equation
Wave functions
Valence bands
polyhedrons
electronics
multipoles
Fermi surfaces
Electronic structure

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Self-consistent relativistic full-potential Korringa-Kohn-Rostoker total-energy method and applications. / Bei Der Kellen, S.; Freeman, Arthur J.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 54, No. 16, 15.10.1996, p. 11187-11198.

Research output: Contribution to journalArticle

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