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Two or More Impurities; Disordered Systems

  • Eleftherios N. Economou
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 7)

Abstract

In this chapter we examine first a system consisting of two “impurities” embedded in a periodic tight binding hamiltonian (TBH). The total t-matrix associated with the two impurities is not simply the sum of t-matrices of each impurity but includes infinitely many terms which correspond physically to multiple scattering events. A diagrammatic representation of this fact is shown in Fig.7.1, where the propagation from site i to site j [described by G(i,j)] is decomposed to unperturbed propagations [described by G (n,n’)] and scattering events (described by the t-matrices T l , T m ) from the impurity sites l and m.

Keywords

Discrete Level Bethe Lattice Coherent Potential Approximation Mobility Edge Impurity Site 
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-Verlag Berlin Heidelberg 1979

Authors and Affiliations

  • Eleftherios N. Economou
    • 1
  1. 1.Department of PhysicsUniversity of VirginiaCharlottesvilleUSA

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