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On the mechanism of atomic diffusion in condensed matter

  • Defects and Impurity Centers, Dislocations, and Physics of Strength
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Abstract

The mechanism of an elementary diffusion act in condensed matter is analyzed by a molecular dynamics method using the example of a three-dimensional lattice with the Lennard-Jones interatomic interaction potential. It is found that, in a certain temperature range, the diffusion of atoms changes in character from individual hopping to cooperative movement of many atoms (stringlike diffusion). The collective displacement of atoms is associated with the nonlinear interatomic potential and manifests itself at specific relationships between the potential barriers and the temperature. Analogous phenomena must occur in any condensed system.

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Authors and Affiliations

  1. Irkutsk State Technical University, Irkutsk, 664074, Russia

    V. V. Alekseenko

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  1. V. V. Alekseenko
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Correspondence to V. V. Alekseenko.

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Original Russian Text © V.V. Alekseenko, 2008, published in Fizika Tverdogo Tela, 2008, Vol. 50, No. 10, pp. 1775–1778.

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Alekseenko, V.V. On the mechanism of atomic diffusion in condensed matter. Phys. Solid State 50, 1848–1851 (2008). https://doi.org/10.1134/S1063783408100107

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  • DOI: https://doi.org/10.1134/S1063783408100107

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