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The many-body theory of impurity resistance which was developed in a previous paper is extended to include all corrections resulting from electron-electron interactions. The model used is a normal Fermi fluid in the presence of a small but finite concentration of randomly scattered, fixed impurities. The resulting expression for the conductivity may be interpreted in terms of independent single-electron-like excitations, or "quasi-particles." The combined effect of the impurities and the many-body interactions causes these quasi-particles to carry current at their group velocity; but there is no effective charge correction.
J. S. Langer (Wed,) studied this question.