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Calculation of the Resistivity of Liquid and Amorphous Au 1− x Si x Using Ziman Theory
Author(s) -
Knuyt G.,
Keupers A.
Publication year - 1984
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221220244
Subject(s) - structure factor , electrical resistivity and conductivity , amorphous solid , condensed matter physics , function (biology) , amorphous metal , materials science , physics , chemistry , crystallography , quantum mechanics , evolutionary biology , biology
The Ziman theory is used in calculating the electrical resistivity σ and its temperature coefficient α for liquid and amorphous Au 1− x Si x . For the liquid the experimental σ( x ) is rather well reproduced using Ashcroft pseudopotentials, while α( x ) is better reproduced by the temperature variation of the mean structure factor than by the pure Ziman result. For amorphous Au 1− x Si x a model is proposed to calculate the various atomic structure factors from the experimental total X‐ray interference function. The resulting σ( x ) and α( x ) agree reasonably with experiment for x ≦ 0.3; in the other cases the Ziman theory fails, probably through the formation of localized states. It is concluded further that it can be a questionable assumption to take α equal to the variation of the structure factor at twice the Fermi wave number.