Rate theory for correlated processes: Double-jumps in adatom diffusion

Preprint

4 July 1997

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9707048

Abstract

We study the rate of activated motion over multiple barriers, in particular the correlated double-jump of an adatom diffusing on a missing-row reconstructed Platinum (110) surface. We develop a Transition Path Theory, showing that the activation energy is given by the minimum-energy trajectory which succeeds in the double-jump. We explicitly calculate this trajectory within an effective-medium molecular dynamics simulation. A cusp in the acceptance region leads to a sqrt{T} prefactor for the activated rate of double-jumps. Theory and numerical results agree.

Keywords

CORRELATED PROCESSES
MOLECULAR DYNAMICS
ADATOM DIFFUSING
RATE THEORY
DOUBLE JUMP
TRAJECTORY
DIFFUSION
PLATINUM
JUMPS

All Related Versions

Version 1, 1997-07-04, ArXiv
Published version: Physical Review Letters, 79 (15), 2843.

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