Electronic properties of KxRb1−xAu , an indirect small gap semiconductor

  • F. Meloni
  • A. Baldereschi
2. Crystal growth and new materials
Part of the Lecture Notes in Physics book series (LNP, volume 152)


The energy bands of RbAu and KAu are calculated by the self-consistent local-density pseudopotential method using hard-core potentials. RbAu is an indirect gap semiconductor whereas KAu is a metal. A study of KxRb1−xAu in the virtual crystal approximation shows that the metal-semiconductor transition occurs at xc=0.45 where the alloy is an indirect zero-gap material. The chemical bonding in KxRb1−xAu is ionic with Au playing the role of anion.


Energy Band Alkali Atom Atomic Potential Atomic Core Electron Charge Density 
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Copyright information

© Springer-Verlag 1982

Authors and Affiliations

  • F. Meloni
    • 1
    • 2
  • A. Baldereschi
    • 2
    • 3
  1. 1.Istituto di Fisica and GNSM-CNRUniversità di CagliariCagliariItaly
  2. 2.Institut de Physique AppliquéeEPF-LausanneSwitzerland
  3. 3.Istituto di Fisica teorica and GNSM-CNRUniversità di TriesteTriesteItaly

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