Relaxation-time dependence of the driving force in electromigration

The relaxation-time dependence of the driving force in electromigration is calculated from an expression derived by Schaich using a density-matrix analysis in the relaxation-time approximation. The result does not support Lodder's conjecture on the dependence of the force on the relaxation time...

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Bibliographic Details
Published inThe Journal of physics and chemistry of solids Vol. 52; no. 3; pp. 501 - 505
Main Authors Chu, C.S., Sorbello, R.S.
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 1991
Elsevier
Subjects
Condensed matter: structure, mechanical and thermal properties
Diffusion in solids
direct force
Electromigration
electron transport
Exact sciences and technology
Physics
relaxation time
Transport properties of condensed matter (nonelectronic)
wind force
Electromigration
electron transport
wind force
relaxation time
direct force
Theoretical study
Density matrix
Electrodiffusion
Relaxation time
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Summary:The relaxation-time dependence of the driving force in electromigration is calculated from an expression derived by Schaich using a density-matrix analysis in the relaxation-time approximation. The result does not support Lodder's conjecture on the dependence of the force on the relaxation time. It is shown that Lodder's conjecture is based upon a subtle error which he made in evaluating a response function in the limit of large relaxation time. Recent experimental results for hydrogen electromigration in disordered transition-metal alloys are discussed in the light of existing theory, and it is concluded that additional effects need to be incorporated into the theory in order to explain these experiments.
ISSN:0022-3697
1879-2553
DOI:10.1016/0022-3697(91)90182-Y