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dc.contributor.author | Valiullin R. | |
dc.contributor.author | Kimmich R. | |
dc.contributor.author | Fatkullin N. | |
dc.date.accessioned | 2018-09-17T21:09:25Z | |
dc.date.available | 2018-09-17T21:09:25Z | |
dc.date.issued | 1997 | |
dc.identifier.issn | 1063-651X | |
dc.identifier.uri | https://dspace.kpfu.ru/xmlui/handle/net/134597 | |
dc.description.abstract | Using a Monte Carlo method, the time dependence of the mean-squared displacements along planar and spherical liquid-solid interfaces and the displacement distribution were simulated for a random walker. In the strong-adsorption-short-displacement limit, the Cauchy propagator typical for Lévy walks was verified. It is shown that the displacements effectively taking place along surfaces follow a superdiffusive time dependence of the mean square. Surface diffusion is the crucial process of the "reorientations mediated by translational displacements" mechanism of spin-lattice relaxation. This is demonstrated by considering a strongly adsorbed molecule population on spherical surfaces or on planar surface patches representing a certain finite orientation correlation length. The conclusion is that Lévy walks on curved surfaces account for the experimental findings obtained with field-cycling NMR relaxometry, whereas strongly adsorbed molecules escaping to the bulk liquid play a minor role. | |
dc.relation.ispartofseries | Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics | |
dc.title | Lévy walks of strong adsorbates on surfaces: Computer simulation and spin-lattice relaxation | |
dc.type | Article | |
dc.relation.ispartofseries-issue | 4 | |
dc.relation.ispartofseries-volume | 56 | |
dc.collection | Публикации сотрудников КФУ | |
dc.relation.startpage | 4371 | |
dc.source.id | SCOPUS1063651X-1997-56-4-SID0000603374 |