Small isotope effect of diffusion in disordered structures.
The isotope effect E of a single jump vacancy diffusion mechanism in statically disordered lattices is investigated by Monte Carlo simulation. It is found that E decreases significantly with increasing disorder. This effect is attributed to percolation processes and ensuing reduction of the effective dimension of space for the diffusing particle.
Lazarev
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NP
NSC Kharkov Institute of Physics and Technology, Akademichna 1, 61108 Kharkov, Ukraine. n.lazarev@kipt.kharkov.ua
Bakai
A S
AS
Abromeit
C
C
Naundorf
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V