Vacancy jump rates in fcc solids are calculated accurately on the basis of the short-memoryaugmented rate theory. We find that the observed isotope and return jump effects are both dominated by a small temperature-dependent fraction of highly anharmonic trajectories in which strong hard-core interactions occur. © 1986 The American Physical Society.
Jump dynamics and the isotope effect in solid state diffusion
Marchese, Maurizio;Jacucci, Gianni;
1986-01-01
Abstract
Vacancy jump rates in fcc solids are calculated accurately on the basis of the short-memoryaugmented rate theory. We find that the observed isotope and return jump effects are both dominated by a small temperature-dependent fraction of highly anharmonic trajectories in which strong hard-core interactions occur. © 1986 The American Physical Society.File in questo prodotto:
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