Open AccessELECTRICAL RESISTIVITY OF SUBSTITUTIONAL ALLOYS
Author(s) -
X. L. Lei
Publication year - 1980
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.29.1395
Subject(s) - electrical resistivity and conductivity , condensed matter physics , materials science , superstructure , scattering , anomaly (physics) , atmospheric temperature range , coherent potential approximation , electronic structure , thermodynamics , physics , quantum mechanics
The Ziman-type resistivity theory developed in reference [1] for disordered crystalline alloys is extended to the systems in which the long range order exists, so that it can be applied to the crystalline pure metals and ordered and disordered substitutional alloys. On the basis of this theory, we have investigated the temperature dependence of the resistivity in these systems within the one-phonon approximation. It is emphasized that the superstructure peaks in the structure factors of alloys would give a significant contribution to their phonon-induced electrical resistivity. On account of its T2 behavior and its being much larger than that due to electron-electron scattering, the electron-phonon resistivity contributed by superstructure peaks would play an important role in the temperature dependence of resistivity in alloys, which behaves as ρ≈ρ0+ρa(T/Θ)2+ρi(T/Θ)5 in a relatively low temperature range. Therefore the anomaly in low temperature resistivity of some A-15 compounds can easily be explained with our model. As an example, the low temperature expression for resistivity of alloys is fitted to the V3Si data of Milewits, the theory is found to be in good agreement with experimental results.