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Fluctuations in Density Functional Theory: Random Metallic Alloys and Itinerant Paramagnets

  • B. L. Gyorffy
  • J. B. Staunton
  • G. M. Stocks
Part of the NATO ASI Series book series (NSSB, volume 337)

Abstract

Multicomponent metallic systems frequently form random solid solutions. In this interesting state of condensed matter, on the average, atoms occupy a regular array of lattice sites but the nature of the atom on a specific site remains a more or less random variable. If the temperature is lowered the system will either order by making the site occupancies a regular sequence as in intermetallic compounds, or phase separate [1]. Towards higher temperatures in the phase diagram the solid solution field is bounded by the melting curve across which the averaged lattice symmetry is lost. As in the cases of other solids the strange properties of random solid solutions are governed by the electron glue that binds the nuclei together. In what follows we shall be concerned with the current state of the theory which aims to describe this degenerate Fermi System using the Density Functional (DT) approach. As it turns out, this problem is of general interest since it is the simplest quantum mechanical example where explicit random fluctuations have been incorporated into Density Functional Theory.

Keywords

Density Functional Theory Local Density Approximation Paramagnetic State Local Moment Coherent Potential Approximation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • B. L. Gyorffy
    • 1
  • J. B. Staunton
    • 2
  • G. M. Stocks
    • 3
  1. 1.H.H. Wills Physics LaboratoryUniversity of BristolBristolUK
  2. 2.Department of PhysicsUniversity of WarwickCoventryUK
  3. 3.Oak Ridge National LaboratoryOak RidgeUSA

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