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“Phonon ineffectiveness” and the influence of Coulomb interactions on the phonon controlled conductivity in high resistivity metals

Authors
Journal
Solid State Communications
0038-1098
Publisher
Elsevier
Publication Date
Volume
53
Issue
11
Identifiers
DOI: 10.1016/0038-1098(85)90481-8

Abstract

Abstract The theory of electronic transport for high resistivity metals developed recently by Belitz and Schirmacher which provides an explanation for the Mooij resistivity anomalies observed in such materials is extended to include the electron-electron Coulomb interaction explicitly. This makes it possible to quantify previous speculations about “phonon ineffectiveness” in disordered metals. It is shown that the weakening of the electron phonon coupling applies only to current relaxation (scattering) but not to density relaxation (phonon-induced tunnelling) processes. It is argued that the presence of density relaxation and not that of the Coulomb induced “phonon ineffectiveness” is the main reason for the occurrence of the Mooij anomalies in high resistivity metals.

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