I have a wonder that if there are two vacancies in the nearby lattice site, they will go together or leave apart. I draw a picture to show my question. If they are go together, does this phenomenon violate the Fick Law?
This problem is studied by simulation in our works:
1. M.G.Ganchenkova and A.V.Nazarov, "Simulation of the defect complex migration and the comparison of the different diffusion mechanisms in the ordered structures ", Diffusion and Reactions, Solid State phenomena, Vol.72, pp.215-226 (2000).
https://www.researchgate.net/publication/243760425_Simulation_of_the_Defect_Complex_Migration_and_the_Comparison_of_the_Different_Diffusion_Mechanisms_in_the_Ordered_Structures
2. M.G.Ganchenkova, A.V.Nazarov, “ Simulation of the defect complex migration in the ordered structures ” , Computational Materials Science, 2000, vol.17, №2-4, p.319
https://www.researchgate.net/publication/229262744_Simulation_of_defect_complex_migration_in_ordered_intermetallic_structures
3. M.G.Ganchenkova, A.V.Nazarov, "Dynamic pair mechanism and its realization in some cases", Met. Phys. Adv. Tech, 2001, vol.19, pp.71-82.
https://www.researchgate.net/publication/296375925_Dynamic_pair_mechanism_and_its_realization_in_some_cases
Article Simulation of the Defect Complex Migration and the Compariso...
Article Simulation of defect complex migration in ordered intermetal...
Article Dynamic pair mechanism and its realization in some cases
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