Analysis of cooperativity and localization for atomic rearrangements

Details Analysis of cooperativity and localization for atomic rearrangements Analysis of cooperativity and localization for atomic rearrangements

2004-09-20

arxiv.org/abs/cond-mat/0409503v1

Physics

Condensed Matter

Other Condensed Matter

38 pages, 10 figures, 1 table

Scientific paper

10.1063/1.1794653

We propose new measures of localization and cooperativity for the analysis of atomic rearrangements. We show that for both clusters and bulk material cooperative rearrangements usually have significantly lower barriers than uncooperative ones, irrespective of the degree of localization. We also find that previous methods used to sample stationary points are biased towards rearrangements of particular types. Linear interpolation between local minima in double-ended transition state searches tends to produce cooperative rearrangements, while random perturbations of all the coordinates, as sometimes used in single-ended searches, has the opposite effect.

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