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Averaged Green's functions of discrete disordered systems from effective energy-dependent probability distributions

Listed author(s):
  • van Biljon, A.J.
  • Scholtz, F.G.
Registered author(s):

    In a discrete disordered system one is interested in computing the averaged Green's function 〈Gij〉. Using the supersymmetry formulation as a starting point, we derive a renormalization group flow equation for the effective probability distribution of a subsystem of fixed size, which preserves 〈Gij〉, as the size of the total system is increased. From this flow equation, averaged Green's functions can be computed directly in the thermodynamic limit, which enables us to compute the density of states and investigate localization/delocalization transitions. As an illustration, we consider the one-dimensional tight-binding Anderson model with Lorentz disorder.

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    File URL: http://www.sciencedirect.com/science/article/pii/S0378437198006153
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    Article provided by Elsevier in its journal Physica A: Statistical Mechanics and its Applications.

    Volume (Year): 266 (1999)
    Issue (Month): 1 ()
    Pages: 351-357

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    Handle: RePEc:eee:phsmap:v:266:y:1999:i:1:p:351-357
    DOI: 10.1016/S0378-4371(98)00615-3
    Contact details of provider: Web page: http://www.journals.elsevier.com/physica-a-statistical-mechpplications/

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