Relaxation-time dependence of the driving force in electromigration

Chon-Saar Chu*, R. S. Sorbello

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


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.

Original languageEnglish
Pages (from-to)501-505
Number of pages5
JournalJournal of Physics and Chemistry of Solids
Issue number3
StatePublished - 1 Jan 1991


  • direct force
  • Electromigration
  • electron transport
  • relaxation time
  • wind force

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