Analytic properties of the Korringa-Kohn-Rostoker coherent-potential approximation

Journal Article · Mon Jun 15 00:00:00 EDT 1992 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.45.14371· OSTI ID:7040482

Suranyi, E; Gonis, A ^[1]

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1. Department of Chemistry and Materials Science, Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

It is shown that the coherent-potential approximation when used in connection with the Green-function formalism of Korringa, Kohn, and Rostoker (KKR-CPA) yields an effective-medium propagator and self-energy that possess the proper analytic structure in the complex-energy plane. The proof emphasizes the unifying features of the CPA within the tight-binding and KKR formalisms, and it is valid for the case of both muffin-tin as well as arbitrarily shaped, space-filling potential cells.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7040482
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 45:24; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
665000 -- Physics of Condensed Matter-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
CALCULATION METHODS
ELECTRONIC STRUCTURE
ENERGY
FUNCTIONS
GREEN FUNCTION
MATRICES
MUFFIN-TIN POTENTIAL
POTENTIALS
PROPAGATOR
S MATRIX
SELF-ENERGY