Green Functions for “One‐Body” Equations Describing the Disordered State
- 1 January 1968
- journal article
- research article
- Published by Wiley in Physica Status Solidi (b)
- Vol. 30 (1) , 247-250
- https://doi.org/10.1002/pssb.19680300130
Abstract
A method for calculating average Green functions for disordered systems is described. The approach consists of a combination of the “equation of motion” method and perturbation theory and is illustrated by considering a simple situation, namely an electron moving in a system of weak potential wells, where there are a number of previous calculations for comparison purposes. The basic idea is, however, applicable to more complex situations where there is no adequate theory, such as the vibrational properties of an amorphous solid.Keywords
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