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Issue		Eur. Phys. J. B Volume 11, Number 3, October_I 1999
Page(s)		369 - 375
DOI		10.1007/s100510050947

Eur. Phys. J. B 11, 369-375

Monte-Carlo analysis of tracer diffusion mechanisms in YBa₂Cu₃O_6+c

K. Skwarek¹ - A. Pekalski¹ - M. Ausloos²

¹ Institute of Theoretical Physics, University of Wrocaw, pl. Maxa Borna 9, 50-204 Wrocaw, Poland
² SUPRAS, Institut de Physique B5, Université de Liège, 4000 Liège, Belgium
apekal@ift.uni.wroc.p, ausloos@gw.unipc.ulg.ac.be

Received 9 November 1998

Abstract
A method for estimating, via the Monte-Carlo simulation, the most often realized diffusion mechanisms in 2D ordered structures is presented. Taking as an example the diffusion of oxygen ions in $\rm 123-YBCO$ high temperature superconductor we propose several diffusion mechanisms and show to what extent they depend on the temperature and concentration of the diffusing particles. Our results are compared with the ones proposed earlier on the basis of energy arguments. We find also additional trajectories, different from those earlier reported in that system.

PACS
02.70.Lq Monte-Carlo and statistical methods - 66.10.Cb Diffusion and thermal diffusion - 74.72.Bk Y-based cuprates

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